Write a CH program to implement a function named Avg, the function receives 2-D array of integer, the number of rows, and the number of columns. This function returns the average of the diagonal elements in the 2D array- double Avg (int a[][3], const int r, const int c); 5 3 8 Example: The function will print: 4 (5+4+3)3 6 4 4 7 1 3 In your main do the following: Create 2-D array of integer of size (3x 3) and initialize it as in the figure above Call Avg Function and print the average to the screen