Write a full menu-driven C program. User will follow the instructions on menu from 1-4. For stable running of the program, please apply the instructions as 1,2,3,4. Another option 5, will be used to quit program and program will give warning if user enter a number except these five options. You are asked to write a complete C program with these options in menu:

(Calculate Class Average): there will be another function float class_average (float grades[]) for calculating the average grade of class. You will sum average grades of students and then divide by 5 to calculate it.