Nilay starts from point A and drives 6 km towards west. He then takes a left turn and drives 8 km. He takes a final right turn and drives 10 km and stops at point B. Ansh starts from point P, which is 15 km east of point A, and drives 5 km towards west. He then takes a left turn and drives 8 km. He takes a final right turn and drives 8 km and stops at point Q. What is the shortest distance between point Q and point B? (All turns are 90° turns only.)

Piyush starts from point A and drives 6 km towards East. He then takes a right turn and drives 3 km. He takes a final right turn and drives 11 km and stops at point B. Sraman starts from point P, which is 12 km East of point A, and drives 5 km towards East. He then takes a right turn and drives 3 km. He takes a final left turn and drives 9 km and stops at point Q. What is the shortest distance between point Q and point B? (All turns are 90 degree turns only)

A man walks 2 km towards North. Then he turns to the East and walks 10 km. After this, he turns to the North and walks 3 km. Again, he turns towards the East and walks 2 km. How far is he from the starting point?