Make sure that you try to answer at least one question first. However, you want to make sure that you do not dominate the conversation or answer every single question unless they ask you to. The questions are very similar to a single person interview generally so prepare like you would for any other interview. Sometimes they will have a small group activity so you will want to be ready to step up and take charge to show leadership skills. Above all make sure you try to relax and have a little fun so that they can see that you can be calm under pressure. I'm sure you will do great!