Final Table question

[Odogg]

There are 6 remaining in a tourney. You are comfortably sitting 3rd in chips with roughly 100k. Two big stacks have between 175k and 215k. The remaining 3 all have less than 35k. Blinds are at 4k - 6k. Two big stacks sit in the small and big blind. You are UTG+2.

You are dealt AK off and raise to 18k. It comes around to the small blind who goes all in.

Do you call or muck?