Study the following information carefully and answer the questions given below:
‘A’ walks 10 km north from point Q to reach point H. he takes a left turn and walks 9 km to reach point S. On the other side, ‘B’ walks 5 km north from point Y to reach point J. point Y is 9 km either east or west from point Q. Next ‘B’ turns to his right and walks 4 km to reach point D. Also ‘A’ turned left from point S and reached point M after walking 5 km. M is in west direction from J.
Q.What is the shortest distance between points m and J?