Write a C++ Program using both if /else if/else and switch Case that determines a students grade. The program will read three types of scores:

Quiz - max 20, mid-term - max 30, and final - max 50) and determine the grade based on the following rules:

- if the average score =90% => grade = A

-if the average score >= 70% and <90% => grade = B

-if the average score>=50% and <70% => grade = C

-if the average score<50% => grade = F