Write a C++ function that takes an array and its size as parameters, then calculates and returns the value, which is equal to max - min.

I need help with this in C++: Write a pair of functions countEven(int *, int) and countOdd(int *, int) which receive an integer array and its size, and returns the count of even or odd numbers in the array.

Given an array of integers of size 10. Write a C++ function that takes the array as a parameter and returns the numbers of elements in the array that are small. A number is called "small" if it is in the range 1..10 inclusive. int ele[10] = {12, 56, -18, 1, 6, 4, 92, 2, 34, 78};; Expected Output: 4

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.