The purpose is to learn something from it, and keep pushing you would get through it don’t give up until you there!
For almost a year, Deborah refuses to talk to Rebecca, and so Rebecca conducts other research, periodically calling Deborah.
Given information is not enough to answer your question appropriately. Let me start explaining with the cases that we can extract from given information:
Case 1: Stacy was driving the car - in this case, Stacy was in driver seat.
Case 2: Someone else was driving the car - in this case, Stacy was in passenger seat.