Sonu walks 10 m west from point A to reach point B. He takes a left turn and walks 9m to reach point C. On the other side, Dinesh walks 5m east from point P to reach point Q. Point A is 9m either north or south from point P. Next Dinesh turns to his left from point Q and walks 4m to reach point R. Sonu also turned left from point Cand reached point D after walking 5m. Q is in east direction from D.
Question- What is the shortest distance between points D and Q?