Four. One to change it and three to write the environmental-impact statement.
No one knows. No one ever watches the choir director.
You will find out when the light comes on.
NINE!
One. But it'll take 3 episodes, and Krillin dies.
As many as it takes submitters to write an original joke. (by accident)
The Apostrosea.
A physicist is atoms studying themselves, while a biologist is cells that study themselves.