According to the law, how should you (vehicle no. 3) behave at the following intersection?

1. Give right of way to the blue vehicle (1).
2. Correct answer: Cross carefully. The two other drivers should yield (3).
3. Give right of way to both vehicles (1,2).
4. Give right of way to the yellow vehicle (2).

WhyBoth cars, on the right and on the left, have Give way signs, and you have no sign. You go first, but carefully.