This is an inverse function problem: (basically opposite). You were given the directions below to get from the lunch room to the gym:
1. Turn left out of the classroom.
2. Turn right at the end of the hallway.
3. At the end of the hallway turn left into the stairwell.
4. Go down the stairs and turn right.
5. The gym is the 5th door on the left.
What are the directions from the gym to the lunchroom?