Identify the category—“personal”, “fatigue”, or “delay”—in which the following job elements belong:
a) A hair-dresser takes the phone to confirm a booking in the middle of a client haircut.
b) A doctor takes a cup of coffee and a quick rest in a short time between visiting two patients.
c) In a long-distance drive, the coach driver stops in a service area every two to three hours to have some food.