Please choose the correct ending to complete the given sentence: Assembling bicycle: We see a man talking in a bike shop. We see the man adjust the bike seat. The man tightens the bike. the man

Ending1: removes the seat and takes the bike off the rack. Ending2: holes the tire with bolts. Ending3: changes the settings of the wheels. Ending4: sits on the bike.

Answer format: ending1/ending2/ending3/ending4