MyLab Math with Pearson eText -- 24-Month Standalone Access Card -- for College Algebra in Context
5th Edition
ISBN: 9780135909621
Author: HARSHBARGER, Ronald, YOCCO, Lisa
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 1.1, Problem 2E
Use the tables below in Exercises 1–6.
2. Table B gives y as a function of x, with y = g(x).
- a. Is 0 an input or an output of this function?
- b. Is g(7) an input or an output of this function?
- c. State the domain and range of this function.
- d. Explain why this relationship describes y as a function of x.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
these are solutions to a tutorial that was done and im a little lost. can someone please explain to me how these iterations function, for example i Do not know how each set of matrices produces a number if someine could explain how its done and provide steps it would be greatly appreciated thanks.
Q1) Classify the following statements as a true or false statements
a. Any ring with identity is a finitely generated right R module.-
b. An ideal 22 is small ideal in Z
c. A nontrivial direct summand of a module cannot be large or small submodule
d. The sum of a finite family of small submodules of a module M is small in M
A module M 0 is called directly indecomposable if and only if 0 and M are
the only direct summands of M
f. A monomorphism a: M-N is said to split if and only if Ker(a) is a direct-
summand in M
& Z₂ contains no minimal submodules
h. Qz is a finitely generated module
i. Every divisible Z-module is injective
j. Every free module is a projective module
Q4) Give an example and explain your claim in each case
a) A module M which has two composition senes 7
b) A free subset of a modale
c) A free module
24
d) A module contains a direct summand submodule 7,
e) A short exact sequence of modules 74.
*************
*********************************
Q.1) Classify the following statements as a true or false statements:
a. If M is a module, then every proper submodule of M is contained in a maximal
submodule of M.
b. The sum of a finite family of small submodules of a module M is small in M.
c. Zz is directly indecomposable.
d. An epimorphism a: M→ N is called solit iff Ker(a) is a direct summand in M.
e. The Z-module has two composition series.
Z
6Z
f. Zz does not have a composition series.
g. Any finitely generated module is a free module.
h. If O→A MW→ 0 is short exact sequence then f is epimorphism.
i. If f is a homomorphism then f-1 is also a homomorphism.
Maximal C≤A if and only if is simple.
Sup
Q.4) Give an example and explain your claim in each case:
Monomorphism not split.
b) A finite free module.
c) Semisimple module.
d) A small submodule A of a module N and a homomorphism op: MN, but
(A) is not small in M.
Chapter 1 Solutions
MyLab Math with Pearson eText -- 24-Month Standalone Access Card -- for College Algebra in Context
Ch. 1.1 - Use the tables below in Exercises 16. 1.Table A...Ch. 1.1 - Use the tables below in Exercises 16. 2.Table B...Ch. 1.1 - Use the tables below in Exercises 16. 3.Use Table...Ch. 1.1 - Use the tables below in Exercises 16. 4.Use Table...Ch. 1.1 - Use the tables below in Exercises 16. 5.Does Table...Ch. 1.1 - Use the tables below in Exercises 16. 6.Does Table...Ch. 1.1 - For each of the functions y = f(x) described...Ch. 1.1 - For each of the functions y = f(x) described...Ch. 1.1 - In Exercises 9 and 10, refer to the graph of the...Ch. 1.1 - Prob. 10E
Ch. 1.1 - If R(x) = 5x + 8, find (a) R(3), (b) R(1), and (c)...Ch. 1.1 - Prob. 12ECh. 1.1 - Does the table below define y as a function of x?...Ch. 1.1 - Prob. 14ECh. 1.1 - Prob. 15ECh. 1.1 - Determine if each graph in Exercises 1518...Ch. 1.1 - Prob. 17ECh. 1.1 - Determine if each graph in Exercises 1518...Ch. 1.1 - Determine whether the graph in the figure...Ch. 1.1 - Prob. 20ECh. 1.1 - Which of the following sets of ordered pairs...Ch. 1.1 - Which of the following sets of ordered pairs...Ch. 1.1 - Which of the following arrow diagrams defines a...Ch. 1.1 - Which of the following arrow diagrams defines a...Ch. 1.1 - In Exercises 2530, find the domain and range for...Ch. 1.1 - In Exercises 2530, find the domain and range for...Ch. 1.1 - In Exercises 2530, find the domain and range for...Ch. 1.1 - In Exercises 2530, find the domain and range for...Ch. 1.1 - In Exercises 2530, find the domain and range for...Ch. 1.1 - In Exercises 2530, find the domain and range for...Ch. 1.1 - If a model has inputs aligned so that X = the...Ch. 1.1 - If a set of data from the years 1990 to 2015 is...Ch. 1.1 - Does x2 + y2 = 4 describe y as a function of x?Ch. 1.1 - Does x2 + 2y = 9 descrbelas a function of x?Ch. 1.1 - The American Lung Association distributes a...Ch. 1.1 - Write an equation to represent the function...Ch. 1.1 - Say F represents a Fahrenheit temperature and C...Ch. 1.1 - Write a verbal statement to represent the function...Ch. 1.1 - In Exercises 3941, determine whether the given...Ch. 1.1 - In Exercises 3941, determine whether the given...Ch. 1.1 - In Exercises 3941, determine whether the given...Ch. 1.1 - Prob. 42ECh. 1.1 - Barcodes A grocery scanner at Safeway connects the...Ch. 1.1 - Piano A childs piano has 12 keys, each of which...Ch. 1.1 - Prob. 45ECh. 1.1 - Prob. 46ECh. 1.1 - Prob. 47ECh. 1.1 - Prob. 48ECh. 1.1 - Prob. 49ECh. 1.1 - Mortgage A couple can afford 800 per month to...Ch. 1.1 - Prob. 51ECh. 1.1 - Working Age The projected ratio of the working-age...Ch. 1.1 - Age at First Marriage The table on the following...Ch. 1.1 - Population of Females under 18 The graph below...Ch. 1.1 - Alzheimers Disease The figure gives the millions...Ch. 1.1 - Prob. 56ECh. 1.1 - Prob. 57ECh. 1.1 - Social Security Funding Social Security benefits...Ch. 1.1 - Prob. 59ECh. 1.1 - Prob. 60ECh. 1.1 - Utilities An electric utility company determines...Ch. 1.1 - Prob. 62ECh. 1.1 - Prob. 63ECh. 1.1 - Projectiles Suppose a ball thrown into the air has...Ch. 1.1 - Test Reliability If a test that has reliability...Ch. 1.1 - Body-Heat Loss The description of body-heat loss...Ch. 1.1 - Prob. 67ECh. 1.1 - Prob. 68ECh. 1.1 - Prob. 69ECh. 1.1 - Height of a Bullet The height of a bullet shot...Ch. 1.2 - a.Complete the table of values for the function y...Ch. 1.2 - Prob. 2ECh. 1.2 - Prob. 3ECh. 1.2 - In Exercises 38, make a table of values for each...Ch. 1.2 - In Exercises 38, make a table of values for each...Ch. 1.2 - Prob. 6ECh. 1.2 - Prob. 7ECh. 1.2 - Prob. 8ECh. 1.2 - Prob. 9ECh. 1.2 - Prob. 10ECh. 1.2 - Prob. 11ECh. 1.2 - Prob. 12ECh. 1.2 - Prob. 13ECh. 1.2 - Prob. 14ECh. 1.2 - Prob. 15ECh. 1.2 - Prob. 16ECh. 1.2 - For Exercises 1518, graph the given function with...Ch. 1.2 - Prob. 18ECh. 1.2 - Prob. 19ECh. 1.2 - For Exercises 1922, find an appropriate viewing...Ch. 1.2 - Prob. 21ECh. 1.2 - Prob. 22ECh. 1.2 - Prob. 23ECh. 1.2 - Prob. 24ECh. 1.2 - Prob. 25ECh. 1.2 - Prob. 26ECh. 1.2 - Prob. 27ECh. 1.2 - Prob. 28ECh. 1.2 - Prob. 29ECh. 1.2 - Prob. 30ECh. 1.2 - Suppose f(x)=x25x million dollars are earned,...Ch. 1.2 - Prob. 32ECh. 1.2 - Prob. 33ECh. 1.2 - Prob. 34ECh. 1.2 - In Exercises 3338, plot the graphs by hand....Ch. 1.2 - In Exercises 3338, plot the graphs by hand....Ch. 1.2 - Prob. 37ECh. 1.2 - Prob. 38ECh. 1.2 - Prob. 39ECh. 1.2 - Prob. 40ECh. 1.2 - Prob. 41ECh. 1.2 - Prob. 42ECh. 1.2 - Prob. 43ECh. 1.2 - Life Expectancy at 65 Using data for selected...Ch. 1.2 - Student Loans Data for selected years from 2011...Ch. 1.2 - Prob. 46ECh. 1.2 - Prob. 47ECh. 1.2 - Prob. 48ECh. 1.2 - Obesity Using data from 2000 and projected to...Ch. 1.2 - Cocaine Use The percent of high school seniors...Ch. 1.2 - Prob. 51ECh. 1.2 - Prob. 52ECh. 1.2 - Prob. 53ECh. 1.2 - Prob. 54ECh. 1.2 - Prob. 55ECh. 1.2 - Prob. 56ECh. 1.3 - Which of the following functions are linear?...Ch. 1.3 - Is the graph in the figure below a function?Ch. 1.3 - Find the slope of the line through (4, 6) and (28,...Ch. 1.3 - Find the slope of the line through (8, 10) and (8,...Ch. 1.3 - Find the slope of the line in the graph that...Ch. 1.3 - Find the slope of the line in the graph below.Ch. 1.3 - In Exercises 710, (a) find the x- and y-intercepts...Ch. 1.3 - In Exercises 710, (a) find the x- and y-intercepts...Ch. 1.3 - In Exercises 710, (a) find the x- and y-intercepts...Ch. 1.3 - In Exercises 710, (a) find the x- and y-intercepts...Ch. 1.3 - If a line is horizontal, then its slope is _____....Ch. 1.3 - Describe the line whose slope was determined in...Ch. 1.3 - For Exercises 1314, determine whether the slope of...Ch. 1.3 - For Exercises 1314, determine whether the slope of...Ch. 1.3 - For Exercises 1518, (a) give the slope of the line...Ch. 1.3 - For Exercises 1518, (a) give the slope of the line...Ch. 1.3 - For Exercises 1518, (a) give the slope of the line...Ch. 1.3 - For Exercises 1518, (a) give the slope of the line...Ch. 1.3 - For each of the functions in Exercises 1921, do...Ch. 1.3 - For each of the functions in Exercises 1921, do...Ch. 1.3 - Prob. 21ECh. 1.3 - Prob. 22ECh. 1.3 - Prob. 23ECh. 1.3 - Prob. 24ECh. 1.3 - Prob. 25ECh. 1.3 - Prob. 26ECh. 1.3 - Prob. 27ECh. 1.3 - Prob. 28ECh. 1.3 - Prob. 29ECh. 1.3 - Prob. 30ECh. 1.3 - Prob. 31ECh. 1.3 - Prob. 32ECh. 1.3 - College Enrollment The total fall enrollment in...Ch. 1.3 - Women in the Workforce Using data and projections...Ch. 1.3 - Life Expectancy at 65 Using data for selected...Ch. 1.3 - Prob. 36ECh. 1.3 - Prob. 37ECh. 1.3 - Prob. 38ECh. 1.3 - Prob. 39ECh. 1.3 - Prob. 40ECh. 1.3 - Life Insurance The monthly rates for a 100,000...Ch. 1.3 - Prob. 42ECh. 1.3 - Prob. 43ECh. 1.3 - Prob. 44ECh. 1.3 - Women in the Workforce Using data from 1950 and...Ch. 1.3 - Prob. 46ECh. 1.3 - Prob. 47ECh. 1.3 - Prob. 48ECh. 1.3 - Prob. 49ECh. 1.3 - Wireless Service Spending The total amount spent...Ch. 1.3 - Prob. 51ECh. 1.3 - Internet Users The percent of the U.S. population...Ch. 1.3 - Depreciation Suppose the cost of a business...Ch. 1.3 - Prob. 54ECh. 1.3 - Prob. 55ECh. 1.3 - Prob. 56ECh. 1.3 - Prob. 57ECh. 1.3 - Marginal Cost Suppose the monthly total cost for...Ch. 1.3 - Prob. 59ECh. 1.3 - Prob. 60ECh. 1.3 - Prob. 61ECh. 1.3 - Prob. 62ECh. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 118, write the equation of the line...Ch. 1.4 - For Exercises 1922, write the equation of the line...Ch. 1.4 - For Exercises 1922, write the equation of the line...Ch. 1.4 - For Exercises 1922, write the equation of the line...Ch. 1.4 - For Exercises 1922, write the equation of the line...Ch. 1.4 - Write the equation of a function if its rate of...Ch. 1.4 - Write the equation of a function if its rate of...Ch. 1.4 - If a function has rate of change 23 and y = 9,...Ch. 1.4 - If a function has rate of change 15 and y = 12...Ch. 1.4 - Prob. 27ECh. 1.4 - Prob. 28ECh. 1.4 - For the function shown in the figure, find the...Ch. 1.4 - Prob. 30ECh. 1.4 - Prob. 31ECh. 1.4 - Prob. 32ECh. 1.4 - Prob. 33ECh. 1.4 - Prob. 34ECh. 1.4 - For the functions given in Exercises 3336, find...Ch. 1.4 - For the functions given in Exercises 3336, find...Ch. 1.4 - Prob. 37ECh. 1.4 - Prob. 38ECh. 1.4 - Prob. 39ECh. 1.4 - Prob. 40ECh. 1.4 - Prob. 41ECh. 1.4 - Sleep Each day a young person should sleep 8 hours...Ch. 1.4 - Prob. 43ECh. 1.4 - Heart Rate The desired heart rate for cardiac...Ch. 1.4 - Prob. 45ECh. 1.4 - Prob. 46ECh. 1.4 - Prob. 47ECh. 1.4 - Prob. 48ECh. 1.4 - Prob. 49ECh. 1.4 - Cost A company buys and retails baseball caps. The...Ch. 1.4 - Prob. 51ECh. 1.4 - Prob. 52ECh. 1.4 - Social Security Monthly social security benefits...Ch. 1.4 - Consumer Price Index Goods and services that cost...Ch. 1.4 - Prob. 55ECh. 1.4 - Blood Alcohol Percent The table below gives the...Ch. 1.4 - Prob. 57ECh. 1.4 - World Population The figure shows the real and...Ch. 1.4 - Prob. 59ECh. 1.4 - Prob. 60ECh. 1.4 - Women in the Workforce The number of women in the...Ch. 1.4 - Prob. 62ECh. 1.4 - Prison Population The graph showing the total...Ch. 1.4 - Investment The graph of the future value of an...Ch. 1.4 - Working Age The scatter plot below projects the...Ch. 1.4 - Women in the Workforce The number of women in the...Ch. 1.4 - Prob. 67ECh. 1.4 - Social Agency A social agency provides emergency...Ch. 1.4 - Average Velocity A ball is shot straight upward,...Ch. 1.4 - Prob. 70ECh. 1.4 - Prob. 71ECh. 1.4 - Prob. 72ECh. 1 - Write the set of all natural numbers N less than 9...Ch. 1 - Is it true that 3{1,3,4,6,8,9,10}?Ch. 1 - Prob. 3TECh. 1 - Prob. 4TECh. 1 - Prob. 5TECh. 1 - Are sets of rational numbers and irrational...Ch. 1 - Prob. 7TECh. 1 - Prob. 8TECh. 1 - Identify the sets of numbers in Exercises 79 as...Ch. 1 - Prob. 10TECh. 1 - Prob. 11TECh. 1 - Prob. 12TECh. 1 - Prob. 13TECh. 1 - Prob. 14TECh. 1 - In Exercises 1315, express each inequality or...Ch. 1 - Prob. 16TECh. 1 - Prob. 17TECh. 1 - Prob. 18TECh. 1 - Prob. 19TECh. 1 - Prob. 20TECh. 1 - Prob. 21TECh. 1 - Prob. 22TECh. 1 - Plot the points (x1, y1) and (x2, y2) on a...Ch. 1 - Prob. 24TECh. 1 - Determine whether each expression in Exercises...Ch. 1 - Prob. 26TECh. 1 - Prob. 27TECh. 1 - Prob. 28TECh. 1 - Prob. 29TECh. 1 - Prob. 30TECh. 1 - Prob. 31TECh. 1 - Prob. 32TECh. 1 - Prob. 33TECh. 1 - Prob. 34TECh. 1 - Prob. 35TECh. 1 - Prob. 36TECh. 1 - Prob. 37TECh. 1 - Prob. 38TECh. 1 - Prob. 39TECh. 1 - In Exercises 3842, find the products....Ch. 1 - Prob. 41TECh. 1 - Prob. 42TECh. 1 - Prob. 43TECh. 1 - Prob. 44TECh. 1 - Prob. 1RECh. 1 - Prob. 2RECh. 1 - Prob. 3RECh. 1 - Prob. 4RECh. 1 - Prob. 5RECh. 1 - Prob. 6RECh. 1 - Prob. 7RECh. 1 - Graph the function y = 3x2.Ch. 1 - Prob. 9RECh. 1 - Prob. 10RECh. 1 - Prob. 11RECh. 1 - Prob. 12RECh. 1 - Prob. 13RECh. 1 - Prob. 14RECh. 1 - Prob. 15RECh. 1 - Prob. 16RECh. 1 - Prob. 17RECh. 1 - Prob. 18RECh. 1 - Prob. 19RECh. 1 - Prob. 20RECh. 1 - Prob. 21RECh. 1 - Prob. 22RECh. 1 - Prob. 23RECh. 1 - Prob. 24RECh. 1 - Prob. 25RECh. 1 - Prob. 26RECh. 1 - Prob. 27RECh. 1 - Prob. 28RECh. 1 - Prob. 29RECh. 1 - Prob. 30RECh. 1 - Prob. 31RECh. 1 - Life Expectancy The figure gives the number of...Ch. 1 - Life Expectancy The figure gives the number of...Ch. 1 - Prob. 34RECh. 1 - Prob. 35RECh. 1 - Prob. 36RECh. 1 - Prob. 37RECh. 1 - Prob. 38RECh. 1 - Prob. 39RECh. 1 - Prob. 40RECh. 1 - Depreciation A business property can be...Ch. 1 - Marginal Profit A company has determined that its...
Additional Math Textbook Solutions
Find more solutions based on key concepts
Teacher Salaries
The following data from several years ago represent salaries (in dollars) from a school distri...
Elementary Statistics: A Step By Step Approach
Find how many SDs above the mean price would be predicted to cost.
Intro Stats, Books a la Carte Edition (5th Edition)
Complete each statement with the correct term from the column on the right. Some of the choices may not be used...
Intermediate Algebra (13th Edition)
Empirical versus Theoretical A Monopoly player claims that the probability of getting a 4 when rolling a six-si...
Introductory Statistics
For Problems 23-28, write in simpler form, as in Example 4. logbFG
Finite Mathematics for Business, Economics, Life Sciences and Social Sciences
Find E(X) for each of the distributions given in Exercise 2.1-3.
Probability And Statistical Inference (10th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.Similar questions
- Prove that Σ prime p≤x p=3 (mod 10) 1 Ρ = for some constant A. log log x + A+O 1 log x "arrow_forwardProve that, for x ≥ 2, d(n) n2 log x = B ― +0 X (금) n≤x where B is a constant that you should determine.arrow_forwardProve that, for x ≥ 2, > narrow_forwardI need diagram with solutionsarrow_forwardT. Determine the least common denominator and the domain for the 2x-3 10 problem: + x²+6x+8 x²+x-12 3 2x 2. Add: + Simplify and 5x+10 x²-2x-8 state the domain. 7 3. Add/Subtract: x+2 1 + x+6 2x+2 4 Simplify and state the domain. x+1 4 4. Subtract: - Simplify 3x-3 x²-3x+2 and state the domain. 1 15 3x-5 5. Add/Subtract: + 2 2x-14 x²-7x Simplify and state the domain.arrow_forwardQ.1) Classify the following statements as a true or false statements: Q a. A simple ring R is simple as a right R-module. b. Every ideal of ZZ is small ideal. very den to is lovaginz c. A nontrivial direct summand of a module cannot be large or small submodule. d. The sum of a finite family of small submodules of a module M is small in M. e. The direct product of a finite family of projective modules is projective f. The sum of a finite family of large submodules of a module M is large in M. g. Zz contains no minimal submodules. h. Qz has no minimal and no maximal submodules. i. Every divisible Z-module is injective. j. Every projective module is a free module. a homomorp cements Q.4) Give an example and explain your claim in each case: a) A module M which has a largest proper submodule, is directly indecomposable. b) A free subset of a module. c) A finite free module. d) A module contains no a direct summand. e) A short split exact sequence of modules.arrow_forward1 2 21. For the matrix A = 3 4 find AT (the transpose of A). 22. Determine whether the vector @ 1 3 2 is perpendicular to -6 3 2 23. If v1 = (2) 3 and v2 = compute V1 V2 (dot product). .arrow_forward7. Find the eigenvalues of the matrix (69) 8. Determine whether the vector (£) 23 is in the span of the vectors -0-0 and 2 2arrow_forward1. Solve for x: 2. Simplify: 2x+5=15. (x+3)² − (x − 2)². - b 3. If a = 3 and 6 = 4, find (a + b)² − (a² + b²). 4. Solve for x in 3x² - 12 = 0. -arrow_forward5. Find the derivative of f(x) = 6. Evaluate the integral: 3x3 2x²+x— 5. - [dz. x² dx.arrow_forward5. Find the greatest common divisor (GCD) of 24 and 36. 6. Is 121 a prime number? If not, find its factors.arrow_forward13. If a fair coin is flipped, what is the probability of getting heads? 14. A bag contains 3 red balls and 2 blue balls. If one ball is picked at random, what is the probability of picking a red ball?arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGALGlencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:9781133382119
Author:Swokowski
Publisher:Cengage
Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
01 - What Is A Differential Equation in Calculus? Learn to Solve Ordinary Differential Equations.; Author: Math and Science;https://www.youtube.com/watch?v=K80YEHQpx9g;License: Standard YouTube License, CC-BY
Higher Order Differential Equation with constant coefficient (GATE) (Part 1) l GATE 2018; Author: GATE Lectures by Dishank;https://www.youtube.com/watch?v=ODxP7BbqAjA;License: Standard YouTube License, CC-BY
Solution of Differential Equations and Initial Value Problems; Author: Jefril Amboy;https://www.youtube.com/watch?v=Q68sk7XS-dc;License: Standard YouTube License, CC-BY