A: Enough to reinforce my negative stereotype about them.
A certain number! One to actually perform the task, and the rest to act in a manner stereotypical of the group.
Mayo mayo mayo mayooooooooooooooooo
None, they enlighten themselves.
Five. Germany to start it, France to try and then give up almost immediately, Italy to start, give up, and try again from the other side, America to finish it and claim credit for the whole thing, and Switzerland to sit in the dark and pretend that nothing happened.
None: A 'Real Woman' would have plenty of Real Men around to do it.
A: Three. One to screw it in and two more to hold down the editor.