Can someone help pls, greatly appreciated

What can you increase the strength of an electromagnet by

Aball is rolled uphill a distance of 5 m before it slows, stops, and begins to roll back. the ball rolls downhill 9 m before coming to rest against a tree. what is the magnitude of the balls displacement? a. 4 meters b. 9 meters c. 14 meters d. 45 meters

Abenefit of using good human relations is that you'll a. have an easy time getting a better job. b. adjust to new situations better. c. find new and better friends. d. try to outdo your friends.