A student wants to go to school from his home. He first walks 500 m North, then turns left and walks 200 m, and finally turns left again and walks 700 m to reach his school. In which direction should he travel from his school to return directly to his home covering the shortest distance?

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?