Please be aware that copying and pasting code from any other source other than code you

have explicitly written on your own is considered plagiarism. If you receive help, that is fine

$($document help in the comments of your code$)$ however you need to write your own code,

name your own variables, and comment your own code. Students turning in the exact same

work as another student will all be given zeros. Plagiarism is not tolerated, and students found

to be plagiarizing will be given a zero and reported to the University with the possibility of

termination of the class and degree program.

For this lab, you will write a program that analyzes grades. The file grades.txt

$($located below this lab in D$2$L$)$ contains a list of student grades from an arbitrary

number of sections.

Each line contains the student ID number, the section number, and the final letter grade

received, separated by a single tab. Your program should open this file and calculate

the average score for each distinct section, keeping in mind that each file contains an

unspecified number of sections.

Note: You may assume this file will always be in the same folder as your python file.

You can convert each letter grade to a number using the following table:

$$ A $==100$

$$ B $==89$

$$ C $==79$

$$ D $==74$

$$ F $==69$

Remember, each section needs to have its own separate average.

Example Output:

Section $1$ average: $81\mathrm{.}943$

Section $2$ average: $81\mathrm{.}803$

Section $3$ average: $82\mathrm{.}108$

Section $4$ average: $82\mathrm{.}093$

Section $5$ average: $82\mathrm{.}61$

You do not need to round or truncate your output. Save your program as Lab$12.$py and

upload just your source file to the appropriate dropbox in GradeScope, NOT D$2$L$!$