I've built a 10-page survey that works. I've now been asked to show custom messages on the Completed/End page depending on a previous pages' answer. For example, on Page 3 of the survey, there is a Yes/No question. If they answer Yes, when they finish the survey, instead of the usual 'Thank you' message, make it show a message like, 'Sorry, we can't help you because you answered Yes....'