I don't think you should even play the A-6 off in mid position. The 8-9d is one where you'd like a bunch of people to see the flop, so I'd call the raise if there were a few people in. If everyone except the raiser is gone, I might just fold and let him take the puny pot. 8-9 isn't a good Heads up hand, cu'z if you do hit, he probably wont, meaning you don't make much anyway. I'd definitely calla raise with the 5's, although I'd prefer to get in a cheaply as possible. If you miss the flop, bail. If you hit a 5 on the flop, there's a good chance you're gonna pick up a pretty decent pot. But I stink, so don't listen to me.