You are constructing a line perpendicular to and passing through a given point M on using only a compass and straightedge. You have drawn arcs with a compass of set width that intersect on each side of M and marked the two intersection points as P and Q. Which sentence tells you how to perform the next step in the construction?
Place the compass needle on P and set its width to M.
Place the compass needle on M and set its width beyond P.
Place the compass needle on P and set its width beyond M.
Place the compass needle on M and set its width to half the distance between P and M.

Question

You are constructing a line perpendicular to  and passing through a given point M on  using only a compass and straightedge. You have drawn arcs with a compass of set width that intersect on each side of M and marked the two intersection points as P and Q. Which sentence tells you how to perform the next step in the construction?
Place the compass needle on P and set its width to M.
Place the compass needle on M and set its width beyond P.
Place the compass needle on P and set its width beyond M.
Place the compass needle on M and set its width to half the distance between P and M.