It said no communication during but you could devise a strategy before play. What I would do on the first challenge is say I would write down the opposite color

It said no communication during but you could devise a strategy before play. What I would do on the first challenge is say I would write down the opposite color of what I see and tell the other person the write down the same color they see so you will definitely at least win $50 "or 100$ if you have the same color". For the suite challenge do the same strategy but split 2 people write down the same suite and have a plan for the other 2 to pick what they don't see.