I am trying to add some subquestions after a Yes or No question. For example:

Does an IT system exist? (yes/no)
If yes, have we discussed a system? (yes/no)
Details

I have the question "Does an IT system exist" with a dropdown yes/no box and
if yes is chosen I want a row containing "If yes, have we discussed a
system?" and another yes/no drop down box to appear and then if yes is chosen
again, one last row with "Details" to appear.

This is just one example of what I need but I think if someone could show me
more or less the basics of how to insert a row with text after an answer is
chosen I could figure the rest out on my own (hopefully!)

Thank you for your help!