Can someone help out with this in Python using def main

Write a program that displays grade distribution. The program contains the following functions: . generateScores. This function generates a list of floating-point numbers that represent test score. Generate 40 numbers between 50.0 and 100.0. and returns to the main function determineGrade. This function accepts a test score as an argument and returns a letter grade for the score based on the following scale: A: 90.0