3.1 Task 1: No return value and no parameters list Write a C program that has a function called print_hello that prints the message "Hello". Call the print_hello function four times from the main. 3.2 Task 2: Parameters list but no return value Write a C program that has a function called print_rectangle that takes two parameters length and width. The print_rectangle will print a rectangle with the given parameters on the screen using asterisks(*). Your program should ask the user to enter the length and width. Finally, your program will call the print_rectangle with the entered values of the length and width. 3.3 Task 3: Return value but no parameters list Write a C program that has two functions called get_double and average. The function get_double reads a double value from the user and returns it. The function average takes two parameters, the sum, and the number_of_values, and it returns the average based on those two parameters. Your program should use the get_double function and the average function to read N values and printing the average. 3.4 Task 4: Task 3: Return value but no parameters list Write a C program that has a function called is perfect_square. The is_perfect_square function has only one integer parameter, x. The function returns 1 (one) if x is a perfect square. Otherwise, it returns 0 (zero). Your program should use the is_perfect_square function, check if each of the numbers from 2 to 50 is a perfect square, print each of these numbers, and whether it is a perfect square or not