Need help with coding in visual basic

You are to write a program to process student grades. Each student takes four courses: Math, CS$,$ English, Business. The data are stored in a file $($exam$.$txt$),$ where the first line contains the subject of four courses, followed by each line consisting of the name of student $($First Name, Last Name$),$ student ID$,$ which is $9$ digit string, and the scores of four courses that each student is taking.

The input file contains the following data:

Math, CS$,$ English, Business

Jon, Benson,$123456789,90,80,70,80$

Brian, Gause,$100000001,88,77,66,99$

Ron, Heath,$204568762,77,66,88,93$

June, King,$332549873,80,91,77,75$

Luke, Savon,$100045423,68,87,81,91$

Tom, McClure,$286453218,77,88,60,90$

Matt, Liskov,$438763298,43,68,70,63$

Matthew, Moses,$550550005,69,59,88,81$

Justin, York,$432876489,93,86,73,55$

Show the whole data in a tabular format like this in a list box.

$\backslash$table$[[$First$,$Last,ID$,$Math,CS$,$English$],[$Business$,,,,,,],[$Jon$,$Benson,$123456789,90,80,70,80],[$Brian$,$Gause,$100000001,88,77,66,99],[$Ron$,$Heath,$204568762,77,66,88,93],[$June$,$King,$332549873,80,91,77,75],[$Luke$,$Savon,$100045423,68,87,81,91],[$Tom$,$McClure,$286453218,77,88,60,90],[$Matt$,$Liskov,$438763298,43,68,70,63],[$Matthew$,$Moses,$550550005,69,59,88,81],[$Justin$,$York,$432876489,93,86,73,55]]$

Show the course average for each course. There should be one decimal digit.

$\backslash$table$[[$Course average,$],[$Math:$,76\mathrm{.}1],[$CS:$,78\mathrm{.}0],[$English:$,74\mathrm{.}8],[$Business:$,80\mathrm{.}8]]$

Show the number of students failed in each course $($the scores less than $70).$

Number of failed students in each course

Math: $3$

CS: $3$

English: $2$

Business: $2$

Show the name and score of the highest score for each course. If there are the same highest scores, show them all.

Highest score

Math: Justin York $(93)$

CS: June King $(91)$

English: Ron Heath, Mattew Moses

$(88)$

scores less than $70).$

Number of failed students in each course

Math: $3$

CS: $3$

English: $2$

Business: $2$

$4.$ Show the name and score of the highest score for each course. If there are the same highest scores, show them all.

Highest score

Math: Justin York $(93)$

CS: June King $(91)$

English: Ron Heath, Mattew Moses $(88)$

Business: Brian Gause $(99)$

$5.$ Show the data sorted by student's last name:

$[[$First$,$Last,ID$,$Math,CS$,$English,Business$]$

$,[$Jon$,$Benson,$123456789,90,80,70,80]$

$[$Brian$,$Gause,$100000001,88,77,66,99],$

$[$Ron$,$Heath,$204568762,77,66,88,93],$

$[$June$,$King,$332549873,80,91,77,75]$

$[$Matt$,$Liskov,$438763298,43,68,70,63],$

$[$Tom$,$McClure,$286453218,77,88,60,90],$

$[$Matthew$,$Moses,$550550005,69,59,88,81],$

$[$Luke$,$Savon,$100045423,68,87,81,91],$

$[$Justin$,$York,$432876489,93,86,73,55]]$

Search for student's last name and show the student name, ID$,$ each score and its grade, and the overall grade.

$90100$ is for $A,8089$ is for $B,7079$ is for $C,6069$ is for D $,$ and $059$ is for F $.$ For example, it the search was done for King, the output should look like this:The overall grade can be obtained with the following formula for June King: $(3+4+2+2)//4=11//4=2\mathrm{.}75.$ Show two decimal digits after the decimal digit for the grade$\mathrm{.}7.$

$($Bonus: $10$ pts $)$ Use the following input data to show the output for the same tasks as in #$1$ #$6.$History, Biology, English, Business, CS Ron, Heath, $204568762,77,66,88,93,75$June, King,$332549873,80,91,77,75,55$Jon, Benson,$123456789,90,80,70,80,80$Tom, McClure,$286453218,77,88,60,90,66$Matt, Liskov,$438763298,43,68,70,63,49$Matthew, Moses,$550550005,69,59,88,81,88$Justin, York,$432876489,93,86,73,55,81$