Mayank starts from Point A and drives 18 km towards east. He then takes a right turn, drives 19 km, turns right and drives 21 km. He then takes a right turn and drives 25 km. He takes a final right turn, drives 3 km and stops at Point P. How far (shortest distan ce) and towards which direction should he drive in order to reach Point A again? (All turns are 90° turns only.)

Deepa moved a distance of 75 m towards the North. She then turned to the left and walked for about 25 m, turned left again and walked 80 m. Finally, she turned to the right. In which direction was she moving finally?

At 6:00 PM in the evening, while sitting and reading in a library, light was entering through a window on the wall to my left. If the main entrance of the library faces East, in which direction was I facing while reading?