Suraj starts driving from point A and drives 4 km towards the East. Then he turns right and drives 6 km to reach point B. Parveen starts driving from point X, which is 3 km East of point B, and drives 5 km towards South. Then he turns right and drives 7 km to reach point Y. Find the shortest distance between point Y and point A. (All turns are 90-degree turns only)

Mr. DEF starts from Point A and drives 16 km towards the north. He then takes a right turn, drives 21 km, turns right and drives 13 km. He then takes a left turn, drives 15 km, turns right and drives 22 km. He then takes a right turn and drives 54 km. He takes a final right turn, drives 19 km and stops at Point P. How far (shortest distance) and towards which direction should he drive in order to reach Point A again?

Pooja starts from her house, walks 200 m northward, then turns 45° to the right and walks 70 m. After that, she turns 90° to the right and walks another 70 m. What is the approximate shortest distance between her current location and her house?