At a flashing yellow light with no other signs, another vehicle approaches from your right at the same time. What is the safest Washington-guide-based response?

1. Slow down, treat it like an uncontrolled intersection, and yield to traffic on your right when required
2. Assume the flashing yellow gives you priority
3. Stop for exactly ten seconds, then go regardless of traffic
4. Drive through because flashing signals are not enforceable