A: Two. One to change it and another one to change it back again.
None - the lightbulb has the capacity for its own revolution
None, we just swap out your whole house
14,000. 1 to hold the lightbulb, 4 to hold the chair, and 13,995 to spin the house.
Four. One to change the bulb, three to stand around so he has someone to hi-five after.
The lips are moving
The clock is still right twice a day.