While a flush draw is possible (more possible for CO than UTG) the Kc on the board reduces the possible cc hands (and Tc also, for CO). AcQc is the only possible two-club hand for UTG. CO has more drawing hands in his range. AcQc, QcJc are just the beginning. Other QJ hands have 8 outs to a straight (or 7ish, if we think UTG probably has at least one of the aces). I'm comfortable playing a set slowly against UTG, but probably not so much against CO.

1. Call flop, leaving 46bb in all stacks and 33.5bb in the pot. If checked to on turn bet 22 into the pot. If bet into, shove. If shoved into, call. Else shove river.
2. Pot has 33.5bb before we act. Shove makes the pot 89.5bb with 56bb to call for UTG and CO, and is likely to fold out the opponents. I tend to favour a shove because CO may have something drawy and he should certainly not get odds for it. They might both fold and I take down a smaller pot for it, but still the best EV I think. Letting CO in cheaply could be an expensive mistake.
3. UTG could be slowplaying a set (TT or KK - 6 combinations) or just checking to fold a missed flop (AQs, AQo, AJs - 16 combinations). It doesn't really matter though - CO may very well have put in the bet as a blocking bet with some fold equity and hoping that he can get additional cards to his potential draws cheaply. I think we have to push.

Edit note: UTG could also have intended to check-raise with AK, so nothing wrong with a push here I think.