What must a motorcycle rider do when an emergency vehicle (vozilo sa prvenstvom prolaza) approaches displaying flashing blue lights and sounding an acoustic siren?

1. Immediately yield the right-of-way, slow down, and pull as far to the right edge of the road (or stop) as necessary to allow clear passage
2. Accelerate to stay ahead of the emergency vehicle
3. Continue at current speed in the center of the lane
4. Stop immediately in the middle of an intersection