Hello everyone!

I have some questions. Some I think I know the answer, but I want to be sure anyway:

1) AK = cap pre flop?

2) A9 blind should call a raise?

3) J9 midlle position should limp?

4) 99 UTG = raise?

5) last, a hand I played the other day:

KK midlle position.
I raised. 1 or 2 guys called.
flop = AAx
I raised, one guy calls.
turn = x
I raised, he reraises me and I fold.
What did I do wrong????

Thx