Your college has a shuttle that runs back and forth all day, with three stops. The first stop is at the dorms. The second is at the food court, 2 miles west of the dorms and the third is at the library, 0.5 miles west of the food court. You get on the bus at the dorms and get off at the food court, accidentally leaving your cell phone. The bus makes 3 round trips before you finally get your phone at the library stop. From the time you left your phone until you got it back, what was its displacement?
0. 5 miles, west
1. 5 miles, east
2. 0 miles, east and west
3. 5 miles, west