$($Data processing$)$ a$.$ Write a C$++$ program to create a data file containing the following

information, or use the grades. dat file provided on this book's Web site.

b$.$ Using the file created in Exercise $4$a$,$ write a C$++$ program that creates student grade

reports. The grade report for each student should contain the student's name and ID num$-$

ber, a list of courses taken, the credits and grade for each course, and a semester grade point

average $($GPA$).$ For example, this is the grade report for the first student:

Student Name: BOKOW, R$.$

Student ID Number: $2333021$

Total Semester Course Credits Completed: $7$

Semester GPA: $4\mathrm{.}0$

The semester GPA is computed in two steps. First, each course grade is assigned a numer$-$

ical value