Question

Step

Description
1

Adjust the compass to a medium width and place it at point B and draw an arc which cuts ray ABat point P and ray BDat point Q.
2

Adjust the compass to the width of line segment PQ and place it at point P and cut an arc.
3

Reduce the width of the compass and place it at point Q and draw an arc which intersects the previous arc at a point S.
4

Use a straightedge to connect the points B and S and extend it beyond S.

Which is the first step that was done incorrectly?