What must a motorcycle rider do when approaching an inverted triangular sign pointing downward with a red border and white background (Znak 'Ukrštanje sa putem sa prvenstvom prolaza' / Yield sign)?

1. Give way (yield priority) to all vehicles moving on the intersecting priority road
2. Come to a mandatory full stop regardless of whether traffic is approaching
3. Accelerate quickly to cross before oncoming traffic arrives
4. Assume absolute priority over vehicles entering from the left