A few questions for the masters

[Bchill24]

1)Jumper B-1 taps the ball twice. After the 2nd tap, the ball touches a non-jumper. B-1 now taps the ball a 3rd time. Is this a violation?

2) B-2's try is in flight, B-1 fouls A-1, the shot is good. Team A isn't in the bonus. Is the throw in from a designated spot?

3)B-1 is in the act of shooting.B-2 fouls A-3, ball goes in. Is the basket good?

4)The official erroneously awards A-1 a one and one. A-1 makes both free throws. B-1 passes to B-2 who shoots and scores. While the ball is at the disposal of team A, the official notices the error. Has the time frame expired to correct the mistake?

5) The ball is dead and B-2 and A-2 foul each other at the same time. Is this a double personal foul?

I appreciate your thoughts.