Directions : Seven cars M,N,O,P,Q,R and S packed in a field. Car N parked 30 m east of Car M. Car R parked south of car N, and distance between car R & car N, is 5 m more than distance between car M and N. Car O parked such the way that it middle of car M and N, and 20 m North of car of car Q. Distance between car Q and S is 10 m less to distance between car N and Car R.  car P parked such way, it is south-west of car S, and 15 m away from both car Q and car R south and West respectively.