WSOP hand

[binions]

$3000 NLHE event. 6K starting chips.

As we go into the 3rd level, I have T24K and am one of the chip leaders. Average is 8K. I have been hot the first 2 levels, always showing down good hands when called.

100-200 blinds. Folded to me on the button. I make it 500 to go with A3 offsuit. Both blinds (7K each) call. Flop is A42. Both blinds check.

What is the correct action?

I decide to bet 800. SB folds. BB raises to 2400.

What is the correct action?

I call. Now 6300 in the pot, and the BB has 6500 left. Turn is a 9. He bets 3000.

What is the correct action?