Jsp Question

Hello Guys!!!
I have a Issue here, and I am kind of sure that i will get the
Answer from here.
I have to make a .jsp page which will have qoestions, and each question will have four options.
(This part I have done)
I am using the tomcat server for this, and I have saved this .jsp file in webapps/ROOTS folder and
it does open when I type http://localhost:8080/myfile.jsp in the browser.

User can select the radio button on the jsp page and click submit.

Now I want the users answer going to the backend and a new page should open, displaying the
total number of choices for each question previously clicked by the different users.
(That is, with every new submit button, a new .jsp file should open, which will display
the total number of choices for each question)

I am planning to use a perrl file in the back end.

Question 1) where should I place my perl file in Tomcat.
Question 2) What is the kind of logic required for this purpose.

Note: I have very new to all these things, and I really want to learn.

Any sort of Help will Be highly Appreciated.
Thank You

Harbir