Because the teacher said it was a piece of cake!
or
From 2nd to 3rd because there's a shortstop in the middle.
or
The letter G.
or
Two, one to call the electrician, and one to mix the drinks.
or
The barman says "I'll serve you, but don't start anything"
or
None, but it takes at least one to sit and pray for the old one to go back on.
or