wrong player accepting free throws

[MOFFICIAL]

I realize preventive officiating could have made all this nonsense go away but what if...

Situation: NF Please
A foul is called on B1 for a hand check on A1. Team A is in the bonus but as they line up to shoot the lead bounces the ball to the free thrower A2 who has lined up to accept the free throw. A2 accepts the ball and before A2 shoots the trail says that A2 is not the shooter A1 is supposed to be the shooter and wacks team A with a T for having the wrong player accept the free throw.
My questions are:
Who does the T belong to?
Does A lose their free throws?