None They don't make Pampers small enough.
Ten. 1 to screw in the lightbulb, and the other 9 to provide emotional support.
Just one provided there's a programmer around to explain how to do it.
A light bulb weighs about 50g and a single ant can lift about.2g, so it takes somewhere around 250 ants working together.
Just one but he wants to do it thirty-two times and when he's done everyone says that his last light bulb was much better.
Spoiled milk.