Foul Shots at the end of an extra period

[b_silliman]

Art N, the period or game is not over until the horn sounds. Yes, if A were leading 51-50 and the horn had sounded to end the game the free throws would not be shot.
But in this case if A misses the free throw, it is possible that a ball could be tapped by B into the basket at the other end of the court to win the game.