None. They have a machine that does that now.
They still haven't figured out how to screw in the lightbulb
Twenty-one.
Yarn.
Twelve. Three to Physically Change the Bulb, Three to Talk About How Complicated it Was and Six to Call themselves Electricians.
A Tattoo.
Pay for the pizza.
A row bot.
Because Eminem's in there (Sorry, it works better when it's spoken)