Mark the following statements as true or false: a. To use a predefined function in a program, you need to know only the name of the function and how to use it. (1) b. A value-returning function returns only one value. (2, 3) c. Parameters allow you to use different values each time the function is called. (2, 7, 9) d. When a return statement executes in a user-defined function, the function immediately exits. (3, 4) e. A value-returning function returns only integer values. (4) f. A variable name cannot be passed to a value parameter. (3, 6) g. If a C++ function does not use parameters, parentheses around the empty parameter list are still required. (2, 3, 6) h. In C + + , the names of the corresponding formal and actual parameters must be the same. (3, 4, 6) i. A function that changes the value of a reference parameter also changes the value of the actual parameter. (7) j. Whenever the value of a reference parameter changes, the value of the actual parameter changes. (7) k. In C++, function definitions can be nested; that is, the definition of one function can be enclosed in the body of another function. (9) l. Using global variables in a program is a better programming style than using local variables, because extra variables can be avoided. (10) m. In a program, global constants are as dangerous as global variables. (10) n. The memory for a static variable remains allocated between function calls. (11)

Q2) Write a program to model a simple calculator. Each data line should consist of the nextoperation to be performed from the list below and the right operand. Assume the left operandis the accumulator value (initial value of 0). You need a function scan_data with two outputparameters that returns the operator and right operand scanned from a data line. You need afunction do_next_op that performs the required operation. do_next_op has two inputparameters (the operator and operand) and one input/output parameter (the accumulator).The valid operators are:+ add- subtract* multiply/ divide^ power (raise left operand to power of right operand)q quitYour calculator should display the accumulator value after each operation. A sample run follows.+ 5.0result so far is 5.0^ 2result so far is 25.0/ 2.0result so far is 12.5q 0final result is 12.5

Computer Science

Programming Language : R programming (R Studio) A twin prime is a prime that has a prime gap of two. Sometimes the term twin prime isused for a pair of twin primes. For example, the five twin prime pairs are (3, 5), (5, 7),(11, 13), (17, 19) and (29, 31). Write a function that returns the number of all twin primepairs between 1 and a given number n.

(C++) 9.  True/False: the strcpy() function will make sure there is enough memory allocated in the destination string before copying C-strings     10.  True/False: when creating a string object, you must dynamically allocate enough bytes to hold the string     11.  Consider the following statement, assuming goAgain is a valid char.  Rewrite it using toupper() or tolower() if (goAgain == 'y' || goAgain == 'Y')     12.  Write a C++ function which accepts a pointer to a C-string as its argument.  It should return the number of words in the C-string.  For example, for the C-string “The Giants won the pennant!” your function should return 5.  You may assume the parameter passed is a pointer to a valid, null-terminated C-string with no newlines or tabs, exactly one space separates each word, and there is at least one word. int wordCounter(char* str)

(Written in C)   Create a payroll program to store and calculate the payroll for a small company as follows:Create an array of floats that is 4 rows and 50 columns, with the columns being the number of employeerecords stored in the array.Program parameters are as follows:Create a menu in a function menu and call it with the following options (use a do-while loop):A or a to add employee infoD or d to display employee infoT or t to display total payrollS or s to display the info of all employeesC or c to display the count of employees present in the arrayF or F to delete a recordZ or z to exit programThe information for each employee is: employee number, hours worked, pay rate per hour, taxdeduction.Option A or a:Call the function possible to check and if the index returned is 50 then output a msg saying that thearray is full. If the index returned is less than 50 the call the function add, pass to it the available index asthe third argument and the function will ask the user for one…

(Python matplotlib or seaborn) CPU Usage We have the hourly average CPU usage for a worker's computer over the course of a week. Each row of data represents a day of the week starting with Monday. Each column of data is an hour in the day starting with 0 being midnight. Create a chart that shows the CPU usage over the week. You should be able to answer the following questions using the chart: When does the worker typically take lunch? Did the worker do work on the weekend? On which weekday did the worker start working on their computer at the latest hour?   cpu_usage = [ [2, 2, 4, 2, 4, 1, 1, 4, 4, 12, 22, 23, 45, 9, 33, 56, 23, 40, 21, 6, 6, 2, 2, 3], # Monday [1, 2, 3, 2, 3, 2, 3, 2, 7, 22, 45, 44, 33, 9, 23, 19, 33, 56, 12, 2, 3, 1, 2, 2], # Tuesday [2, 3, 1, 2, 4, 4, 2, 2, 1, 2, 5, 31, 54, 7, 6, 34, 68, 34, 49, 6, 6, 2, 2, 3], # Wednesday [1, 2, 3, 2, 4, 1, 2, 4, 1, 17, 24, 18, 41, 3, 44, 42, 12, 36, 41, 2, 2, 4, 2, 4], # Thursday [4, 1, 2, 2, 3, 2, 5, 1, 2, 12, 33, 27, 43, 8,…

the following 12. (Greatest Common Divisor) Given two integers x and recursive definition determines the greatest common divisor of x and y, written gcd(x,y): Y, if y = 0 gcd(x, y) = %3D gcd(y, x%y) if yチ0 Note: In this definition, % is the mod operator. write a recursive function, gcd, that takes as parameters two integers and returns the greatest common divisor of the numbers. Also, write a pro- gram to test your function.

C++ Programming. Topic: Working with pointers and dynamic memory. Indicators. Working with dynamic memory. Dynamic arrays and their use as function parameters. Task : Describe a void function named Swap(x,y) that swaps the values ​​stored in the variables x and (x is a real type parameter and is both input and output). Using this function , for the given variables of real type a, b, c, d, one should sequentially replace the values ​​of the pairs (a, b), (c, d) and (b, c) and let a, b, c, d be new values ​​.