You encounter an elderly pedestrian who appears hesitant or confused at a zebra crossing. As a motorcyclist, what is the most appropriate response?

1. Rev your engine to get their attention and encourage them to cross.
2. Slow down, stop well before the crossing, and give a clear, reassuring hand signal.
3. Ride slowly around them as they are likely to stay put.
4. Proceed with caution but do not stop unless they step onto the crossing.