C Program.

A. Write a function that takes an array of ints, and the size of the array another int. It also returns a double. Call this one average. Return a double that is the average of the values in the array. Demonstrate that it works by finding the average of an array with these values {78, 90, 56, 99, 88, 68, 92}

B. Write a function that takes one double parameter, and returns a char. The parameter represents a grade, and the char represents the corresponding letter grade. If you pass in 90, the char returned will be A. If you pass in 58.67, the char returned will be an F etc. Use the grading scheme on the syllabus for this course to decide what letter to return.

C. Write a function that takes 3 int arguments and returns the largest of the 3.