Two Questions - 1) Punching the basketball and 2) Jumping off a teammate

[bradfordwilkins]

Trying to find the specific rules for HS that say punching the ball is illegal.

Also can't find the rule that would forbid a player from jumping off the back of another player, for instance a White Player #1 gets on his hands and knees and White player #2 uses that players back to go up for a slam dunk. Where is the violation?

Thanks