I push the first one without thinking. The blinds seem a little small in the second hand to push, but you'd call a raise, so you might as well push, especially if there are antes. I check the last one and see a flop. A push doesn't strike me as terrible, but I don't see him calling with much that you beat. You're also in position and unlikely to hit a flop on which you're dominated. Should be easy enough to play.