Write:

A Python program that calculates letter grades for students. The user enters the student's name, total quiz score (q), total assignment score (a), midterm exam score (m), and final exam score (f). All entered scores are out of 100. Your program should read all the input, calculate the average score, compute the letter grade and display the average score and the letter grade.

average score = (q * 15%) + (a * 40%) + (m * 20%) + (f * 25%)

Use a straight grading scale for assigning letter grades (A, B, C, D, F).