Please choose the correct ending to complete the given sentence: Fixing bicycle: A man is wearing glasses inside a workshop. He holds up a bike wheel while he talks. he

Ending1: talks about its sharpness many times. Ending2: irons the edges of the bike wheel. Ending3: shows how to mount the wheel onto the bike. Ending4: then shows how to use it when he has a problem.

Answer format: ending1/ending2/ending3/ending4