OOB and player's hair

[ysong]

some of my age long questions
#1:
is the tip of the hair (curly but not long) considered the "body" of a player? if the ball touches a player's hair only, (not the scalp), without any change in its direction and go OOB, do you consider that player is the "last touched" by the ball? does it apply to pony tail too?

#2: A1 is holding the ball and looking for a pass, B1 sneaks up and bats A1's hand and sends the ball OOB. Let's say B1 did not touch the ball at all, so A1 is the last one touched the ball, do give the ball to B team for throw in? what if B1 touched the ball and A1's hand in the same time?

#3: when you did not see who's hand realy touched the ball last, do you usually use the direction of the ball and the motion of players hand at that moment to judge the call, if it seems appearent? or you usually give them a jump ball?

Thanks