Is boosting allowed?

[potato]

Probably very rare occasion would such thing happen.

But is there any rule to prevent teammates from doing the following?

1.Act as a stepping stone for a teammate to step on him for a boost to jump higher like using a knee + hand for a boost.

2.Hug his teammate so his teammate remains airborne. Or boost whether for offense or defense.

3.Carry his teammate who is holding the ball around the court without his teammate dribbling.

4.Hands on teammate's shoulder using it as a boost.

5.Jumping over a teammate or defender without contacts.