I think both are close. Unless you have a read that any of the aggressors here bluff with some frequency (and at this level, I assume the opposite) there is a very real chance you are beat.

Hand 1, he could have 77-88,TT, or a 4(!?) or 44/9x. QQ-AA seem quite unlikley, but people have been known to screw these up pre-flop. In any case, he thinks he's ahead. Since your hand looks like an overpair, the pairs <9 seem not real likely. Basically, you beat TT. I don't think the "slow playing" 9 factors here because the pot is so big. I think you have to call given the pot odds.

Hand 2, I think he has 2pair or straight or set. AT/JJ is the only hand you beat. Again, all bets are off if you think he is just trying to float you off your c-bet, or you have seem him play a draw fast. I would expect a m/r if he's calling bs, though.

Again, you are so short, you cannot fold.