Hand 1) This hand is pretty useless imo :P There's no question here. The way you played it, this is the biggest snap ever. the only question is whether or not you should bet flop and I don't mind betting there, esp if he's the type that will 4bet AK from utg.

Hand 2) Can't raise since player behind you could have nuts, so just flat.

Hand 3) If you're gonna 3bet this hand, ofc cbet this flop. As played, I'd imagine he should be somewhat scared of a slow play here so his betting is odd. I'd prob spew raise here sometimes to rep a slow played flop. Folding is fine.