Under Article 76 of the Implementing Regulation, what is the mandatory duty of a driver approaching a marked pedestrian crossing that is NOT controlled by a signal, sign, or traffic officer?

1. Sound the horn to urge the pedestrian to hurry across before proceeding
2. Stop completely before the crossing if a pedestrian has stepped onto or is crossing, and remain stopped until they have finished crossing
3. Weave around the pedestrian's back without coming to a complete stop
4. Flash high beams and accelerate if the pedestrian is on the left half of the crossing