You are approaching a crosswalk without a traffic light. A person standing at the edge of the sidewalk is looking toward the roadway, about to use the crosswalk, but has not yet stepped into the roadway. What is the correct way to drive?

1. ①The person has not started crossing yet, so drive on through
2. ②Sound the horn so the person waits until you have passed
3. ③Slow down a little but pass before the pedestrian steps into the roadway
4. ④Stop temporarily before the crosswalk (at the stop line, if there is one)