1. I don't c-bet this flop multi-way. It's drawy and likely hit somebody's hand somehow. As played, fold to the check/min-raise.

2. I raise the flop harder to $5. As played, bet $6 on the turn. If he doesn't have at least a K you're not making much money here. If he does have a K you want to get as much money in the pot as possible. He's passive post-flop, so you're gonna have to do the betting.