You can declare "local" variables in Racket via the use of the let function. For example, try the following code: (define a 2);;binding a variable to a value (define b 3) (define c 4) (define (strange x)     (let ((a 1) (b 2))       (+ x a b)))) After executing this code, what are the values of a, b, and c? What is the return value when you make the call (strange 4)? Explain your answers.

Can you hep me create three different classes in C++ in the following question? (Important: Do not use the header file chrono or elements like ‘other’.)  (Note: The sensor class can have functions to determine if two sensors are adjacent and calculate the speed between them, while the time stamp class can have functions to calculate the time elapsed between two time stamps.) Racer class should have:
1. This is a class that contains data related to a race. The private data includes the racer number (an integer) and sensor data. The sensor data includes the sensor number (an integer), mile marker for the sensor (a double), and time stamp for each sensor (when the racer passed the sensor) with hour, minute, second, and millisecond. The class also has instance variables that hold a racer's total race time, total race distance, and total race speed. 2. The class has a default constructor. 3. The class has a copy constructor that ensures any vectors contained in the class are copied. 4.…

*68. What is the return value of f (p, p), if the value of p is initialized to 5 before the call? Note that the first parameter is passed by reference, whereas the second parameter is passed by value. int f(int &x, int c) { c = c 1; if X = X + 1; return f(x, c) } (a) 3024 (c==0) return 1; * X; (b) 6561 (c) 55440 (d) 161051

Please add a destructor to the code. Solve this in C++

8. using c++, Write a function method that determines the mean of all the values in an array of integers. Your mean function should call a separate function that you write that determines the sum. Don’t use built-in sum or mean gadgets, but roll your own.

What is the value stored at x, given the statements?  int x; x = 6 /  static_cast<int>  (4.5 + 6.4);

def truth_value(integer):    """Convert an integer into a truth value."""    # Convert 0 into False and all other integers,    # including 1, into True    if integer == 0:        truth_value = False    else:        truth_value = True    return truth_value Now, write a function that goes in the opposite direction of the truth_value() function. This new function should convert a truth value into an integer. In particular, True should be converted into 1 and False into 0. Name the new function integer_0_or_1(). All you need to include below is your definition of the function integer_0_or_1(). It will be tested automatically against relevant inputs. So include your function and nothing more.

can someone help me with this in C++ In this program, you must implement I/O operator overloading (<< and >>) to match a shape's functionality. You must modify the following files: Triangle.h Implement the declaration for the overloaded I/O operator functions. Triangle.cpp Implement the calculateArea() function to find the area of the triangle. Implement the definitions for the overloaded I/O operator functions. The input function will take in two variables: The base and height (cin >> base >> height) Call the object's calculateArea() function after inputting the variables. The output function will send the following to the output stream (for base = 10 and height = 20): Triangle Object: Base: 10 Height: 20 Area is: 100 Square.h Implement the declaration for the overloaded I/O operator functions. Square.cpp Implement the calculateArea() function to find the area of the square. Implement the definitions for the overloaded I/O operator functions. The…

In C++ Language (please use hint) : Write a function which will swap its arguments if the first argument is greater than its second argument, but will not interchange them if the first argument is samller than or equal to the second argument. The function should return 1 if a swap was made, and 0 otherwise.  (Hint: Make sure to use call by reference.) Write also a short test driver (i.e. a main() invoking your function).

Can you write in C++