#1 His M is 6, so I think his range is pretty wide, and you should be a favorite, but I don't really know the player. Feel like gambling? I'd call.

#3 I think I'd push. I'd want to reraise to about 16K, but that basically pot commits you. Calling is terrible as you probably get squeezed. You're not in terrible shape, so folding is still an option, but you need to start accumulating chips pretty soon.

#4 Fold. You'll have better spots to get your chips in, I think.