Write a grading program for a class with the following grading policies:

a$.$ There are three quizzes, each graded based on $10$ points.

b$.$ There is one midterm exam, graded based on $100$ points.

c$.$ There is one final exam, graded based on $100$ points.

$20\%$

$[100$ pts$.]$

The final exam counts for $40\%$ of the grade. The midterm counts f