C++ Exercise 2

[5 points] Write a function that checks whether an integer is even or not. The function should return true if the input parameter is even and false otherwise. The function prototype is given below:

// returns true if x is even and false otherwise bool is_even(int x);

[5 points] Write an iterative function that determines the number of even elements in an array a of integers of size n. The function should return the number of elements that are even in array a of size n. Propose an appropriate prototype for your function and then write its code.

[10 points] Write a recursive function to solve the above problem. Propose an appropriate prototype for your function and then write its code.