6: 2 to screw in the bulb and 4 to testify that it was lit from the moment they began screwing.
or
Microwaves.
or
Nearly unanswerable, since the one who tries to change it usually drops it, and the others call for a planning session.
or
He had no patients.
or
When it came time to pay, the skunk didn't have a scent, the deer didn't have a buck so they put the meal on the duck's bill.
or