I do, I don't know if it's actually correct but you have the odds to set mine, the only issue being how often is the CO Jamming (Relatively), readless I'm assuming the CO has a wide enough range that he's calling a lot more than he's jamming. So yes, but the answer changes with the reads you have on the CO.

I dont think too call here  is a good idea in this spot you are against 3 other players and even if you hit your set against 3 other players there is also the possibility you against a higher set  with your 55 I think fold is the better option !! 

I'd call. If I didn't miscalculate, you need to win another $8.50 postflop to make the call break-even (and no, you don't have direct odds since you only flop a set roughly once in nine times). That seems more than likely given how big the pot already is. And I wouldn't fear being oversetted because first of all it's very unlikely and secondly you might as well overset someone else or - way more likely - stack BB's big hand.

Absolutely. You're getting a great price to flop and set and win a big pot. I wouldn't have called a squeeze HU, though.

Thanks guys! Seems like such a simple spot, but I wasnt sure about it, so good to know!

Yep, the deeper you are the better these spots are.  Multiway makes it even better in my opinion.