None, because they can't climb the ladder.
None. They can't get that high! (My band teacher told me that one today)
Two!.......pac. (*It's a lot better spoken than written.*)
Two. One to assure that everything possible is being done about the situation and the other one to screw it into the faucet.
One. He puts the bulb in and lets the world revolve around him.
A Friar
May I take your order?