flush draws

2 topics both after the flop, both everyone is full stacks:

1) you have an A high flush draw 2 players behind you go all in on the flop. do you call?

2) you have a gut shot straight and an A high flush draw. 2 players behind you go all in do you call?

please discuss

If board is not paired I might do that. I certainly will at
option 2. But I like more to be starting aggressor in
situations like I have top or middle pair and redraw to
nut flush.

You haven't given enough info here. The pot size makes a difference. It could be as little as 3bb, or easily 18 bb. Also the actual flop board and the range you put your opponents on is important.

If the board is paired I probably wouldn't go all in because of the possibility of a full house. Maybe with the gutshot draw as well.

Otherwise it's all about the odds of you hitting the best hand. With the flush draw you have 35% chance of hitting so you've got odds for that, but you need to worry about the board pairing and two-pair or a set (likely hands in this scenario) hitting their boat (maybe someone can do the maths). Probably fold, but also depends on reads and pot size.

With the flush + gutshot it's 45%, so you have great odds there. Always a call.

the reason why I bring this up is because, I was in a hand 50NL where it was preflopped raised by CO and 3 people called including me. pot is about $6 and I am in early position. flop is all cards Th 2s 8h and below with 2 hearts, and I have middle set in EP. I bet $3 to induce a raise by CO. MP player calls (I assume flush draw or top pair) CO raises to $6 I re-raise to $15 MP calls, CO goes all in about $50 I call and MP calls. MP holds QhJh wins with a gut shot straight to J.

anyways, I would hope someone could work out the math and see what kind of flush draws should you go all in on, if atleast 1 villian has a set.