Calculate the overall average of Prelim, Midterm, and Finals grades by entering the grades. The grading system is as follows: Excellent (94-100), Very Good (88-93), Good (82-87), Satisfactory (79-81), Fair (76-78), Passed (75-76), Failed (0-74).
Sample Output-
Prelim Grade:98
Midterm Grade:92
Final Grade:94
General Average:94
Excellent