Please help with the following problem I have been stuck on it for hours. I can't seem to figure it out. The problem is for visual basic, it comes from the book an introduction to programming using visual basic. Pease give full code if you can. I also need the program to run with option strict on. Thank you.

Question:

Curve Grades Statisticians use the concepts of mean and standard deviation to describe a collection of data. The mean is the average value of the items, and the standard deviation measures the spread or dispersal of the numbers about the mean. Formally, if x1, x2, x3, ? ? ? ,xn, is a collection of data, then

and standard deviation =

The file Scores.txt contains exam scores. The first four lines of the file hold the numbers 59, 60, 65, and 75. Write a program to calculate the mean and standard deviation of the exam scores, assign letter grades to each exam score, ES, as follows, and then display a list of the exam scores along with their corresponding grades, as shown in Fig. 7.72.

For instance, if m were 70 and s were 12, then grades of 88 or above would receive As, grades between 76 and 87 would receive Bs, and so on. A process of this type is referred to as curving grades.