Which sequence best matches preparing to leave after all students have boarded and are accounted for?

1. Close the door, engage the transmission, release the parking brake, turn off red lights, signal left, check mirrors, then move when safe
2. Release the parking brake first, leave the door open, and move immediately
3. Turn off all mirrors, keep the red lights on, and back away from the stop
4. Ask students to stand and direct traffic before the bus moves