Thanks very much guys but am trying to integrate it with my existing lines of code to meet
the needs of the script. These are actually what the entire script should be doing:

The script will be set up in a directory called firstgrade in the user's home directory. Script name is grade. Students should then be given access so they can run it. The program should be as general purpose as possible and as robust as possible. It should display a set of multiple choice questions, read the answer and check whether the answer is right. The overall score for every student should be recorded as well. The interface will be text based and so fairly rudimentary and should look something like:-
.....
3. What is the capital of the United States of America?
a) Florida
b) Chicago
c) Washington D.C
d) none of these
Enter answer
c
Enter question number, N for next question, P for previous question or Q for done
n


At the end it should tell the participant how many questions they got right. The script should check that the person doing the test is who they say they are and that they haven't done the test before. e.g. something like
....
Enter your username
john
Enter your password
12345
You only have one attempt and you have already done the test
....
The script should incorporate a time limit on the test. As well as this grade script, another script called display which will display all the results in either alphabetic order is needed, or numeric order. A separate setup script should copy the grade and display scripts into the firstgrade directory. A timer should also show the student how many minutes remaining and the script should automatically exit and call the display script to show the student his result (right and wrong ones with the corrections) at t=60mins. Users should also be able to view their results later with their username and password, say, one week later.

This is actually the true picture of everything. I will really appreciate if you would help me make this work.

Thanks.