Approaching the elevator, you push a button next to the door, which causes the metal gates to open. Entering the elevator, you are faced with a panel that houses five buttons labeled 1 to 5 – the third button is illuminated, which you assume means you are presently on the 3^rd floor. What do you do?

1. Push button “1”
2. Push button “2”
3. Push button “4”
4. Push button “5”