A: Three - one to change it, one to not-change it and one to both change-and not-change it.
Depends on the supply and demand curve
They can't change anything lol
A: If we change the light bulb we'll have to change everything.
A. 3. 1 to find the bulb 1 to find a ladder and 1 to find a man.
Ohmmmmmm............
They can't deal with attachments.
