I'd think of like 3 or 4 for each. Or just write down all the previous experiences you've had that may be relevant to skills needed to be an ATCO, because although I thought I was well prepared they still threw a spanner in the works by saying "yeeaaah that example doesn't work with the rest of the questions" and you'd be put on the spot to think of another example.
Loved the team game though. I wanna do that again because I thought I'd cracked it until they came around with those cards.