What is the legal duty of a driver when an emergency vehicle (ambulance, fire engine, police) approaches with flashing emergency lights or sirens?

1. Accelerate to lead the emergency vehicle through intersections
2. Stop dead in the middle lane immediately without pulling over
3. Race alongside the emergency vehicle to take advantage of cleared traffic
4. Yield right-of-way by signaling and moving safely to the right-hand edge of the road, stopping if necessary, to clear an open path