question about double dribble

[schwza]

This is a question from a pickup basketball game, but nobody really knows the rules, so I thought I'd ask some actual referees.

1. A player is dribbling the ball, and then begins to pick it up. He touches the ball with both hands at the same time, but does not control it, and it bounces on the floor. He picks it up. Is this a double dribble (or some other violation)?

2. Instead of picking it up, he tap it to a teammate.

3. Instead of picking it up, he starts dribbling again.

4. Suppose he dribbles, then picks it up cleanly with two hands, and then tries to pass, but the ball slips out of his hands and bounces on the floor. He grabs the ball.

Thanks!