Here is how the program will look. In this example, we will write software to help a college teacher who wants to grade on a curve. Specifically, the instructor teaches a class that has 50 students and five exams. The instructor will assign a letter grade to each student on each exam based on this distribution: CURVED GRADE CALCULATOR Enter name of test scores file: test scores.txt A B C D >= +1.250 >= +0.250 >=u-10 >=u-20 = +1.250 >= +0.250 >=u-10 >=u-20