One...but it takes him 27 tries
None. TSA agents only know how to remove clothes putting them on is different matter completely.
Probably one but you can't generalise.
Yes
N! One to change the light bulb, and n-1 to display stereotypical behavioral traits of X!
Have everybody chip in.
Two. One to screw it in and one to film it. One, but it takes him fifty tries.