One. But he gets three hours credit.
None. Who do you think broke the filament in the first place
One Brazillion.
Answer is 2. One to change the lightbulb while the other screams "REPOST"
None. The light bulb shall never burn out. (OK. It's more cathartic than funny...)
An hour after its landed its still whining.
I said. "Yes, they're coming to pick you up in an hour"