Q. Where are the phone charging stations?

Rose Library offers phone charging stations on every floor but the fifth floor. The stations are located near the elevators. Details:

1. First Floor: the charging station is behind the stairs, next to the supplies vending machine.
2. Second Floor: Through the glass door in front of the elevators, and then on the wall to the left.
3. Third Floor: Just outside of the elevators.
4. Fourth Floor: Stepping off the elevator, it is along the wall to the left.