Just two, but they'd have to be really small.
One to hold the lightbulb, and the rest of the world to revolve around them
Somewhere between 0 and infinity.
One to screw in the lightbulb, stock four carts of supplies, and handle seventeen simultaneous customers at any one time for five consecutive hours.
None. They don't accept change, even if it means a brighter world.
People that would use said word can't read.
Because it was Low key