Prison Party - Answers or a Pie

Prison Party  When I was a student, I went to a Prison Party. 

The room had been decorated to look like a prison and the only food being served was gruel.  (There was a bar, just in case you’re wondering what the attraction was!) 

From time to time, people were arrested and interrogated. 

Anyone who failed to answer all three questions correctly got a custard pie in the face. 

The third question always seemed to be impossible; can’t think why.