When approaching a school bus stopped on the road with flashing warning signals while boarding or disembarking children, what is your legal duty?

1. Sound the horn continuously and maintain your maximum cruising speed
2. Slow down significantly, prepare to stop, and pass with extreme caution maintaining a safe lateral distance
3. Overtake the school bus on the right side using the sidewalk
4. Always come to a mandatory full stop behind the bus for at least 10 minutes