In python

1. The purpose of the getFile() function is to prompt the user for the filename which contains the grades and return it to main().

2. The purpose of the getData() function is to read the file grade data into a list and return the list to main(). This function should receive the filename as an argument.

3. The purpose of the calculateMean() function is to receive the grade list as an argument and using the above mathematical formula, calculate and return the mean of the grades.

4. The purpose of the calculateSD() function is to receive the grade list as an argument along with the mean and using the above mathematical formula, calculate and return the standard deviation.

5. Since all the relevant data has been calculated, the program needs to call the curveGrades() function and apply the following logic while assigning a letter grade to grade. You need to pass in as arguments the grade list, mean and standard deviation.

Grade curve logic:

Formula

Grade

grade ? m + 1.5(sd)

assign a letter grade of

A

m + 0.5(sd) ? grade

assign a letter grade of

B

m 0.5(sd) ? grade

assign a letter grade of

C

m 1.5(sd) ? grade

assign a letter grade of

D

grade

assign a letter grade of

F

6. All variables are to be local.

7. The only math function you may use is sqrt(). No statistical functions are allowed.

8. The displayTitles() function should print the first five (5) lines.

Note the standard deviation should print out using an accuracy of four (4) places past the decimal point.

9. The output should be in consistent columns of size 2, 7 and 3.