pass into hoop question, buzzer

[mutantducky]

I was looking through some threads on this and got a few questions.

If a pass beyond the three goes into the basket that is worth three points correct? If it hits off either the defense or offense player's head who is inside the arc it counts as two?

3. Pass off someone head or shoulder and clearly not a try and buzzer goes off while ball in the air and then basket made would you count the basket? I thought it was no on this.
4. If a pass goes into the hoop but the buzzer goes off while it is in the air would it still count?