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

- Give right of way to the blue vehicle (1).
- Correct answer: Cross carefully. The two other drivers should yield (3).
- Give right of way to both vehicles (1,2).
- Give right of way to the yellow vehicle (2).
Why this is the answer
The correct answer in the official bank: Cross carefully. The two other drivers should yield (3).
The yellow vehicle (2) is approaching from a road with a yield sign, so it must give way to you. The blue vehicle (1) is coming out of an area off the road, across the sidewalk, and a driver entering the road that way must yield to all traffic on it. You may proceed, but cross carefully and make sure the others actually let you pass.