hand 1:
more on the turn, b/f river.
This is an interesting hand to figure out ranges. - do that, and then see how it changes if the flop is the Ks instead the As.

second hand: you didn't say if he 3b pre - specifically min 3-b... but even if it's the first time he 3-bets this is a fold preflop over that sample. At best it's a VERY marginal call.