$$uestion $3[6$ Points$]$

Consider a database data.txt which has data in the following format:

$(4$ digits$)($string$)(0-100)$

$(0-100)(0-100)$

Write a menu driven shell script that outputs the following menu and takes input from the user in the form of a number $(1/2/3/4)$:

$1.$ Add a student record

$2.$ Print the list of students above passing marks $(>=33$ in each subject$)$

$3.$ Print the list of students with their divisions. Rules for divisions are:

$$ Ist division: Pass and $>=75\%$ marks on average

$$ IInd division: Pass and $60\%<=$ marks $<75\%$

$$ IIIrd division: Pass and $33\%<=$ marks $<60\%$

$$ Fail: Otherwise

$4.$ Delete a student record

$5.$ Exit

If user input is $1,$ then ask the user for each entry $($Roll number, Name, etc$)$ separately and add the record in the file. For any wrong entry, prompt the user to input again. To delete a student record, take in the roll number