Please choose the correct ending to complete the given sentence: Assembling bicycle: He is putting training wheels on the back wheel of the bike. He puts the front tire on the bike. He puts the handlebars on the bike. he

Ending1: puts the pedals onto the bike. Ending2: puts the spare tire on the bike. Ending3: puts on either helmet. Ending4: puts the jack on the bike, he puts go of the tire on the handlebars.

Answer format: ending1/ending2/ending3/ending4