Just one. To threaten suicide if you don't change it for him/her.
Only one. But they have to sit in the dark room for a year, first, to make sure that the lightbulb is out.
Depends on how clumsy you are.
None, because they can't climb the ladder.
None They don't make Pampers small enough.
One to change the lightbulb and one to drive down to Kent to pick him/her up.
A: Only one but it may take him/her more than five years to do it.