Please choose the correct ending to complete the given sentence: Fixing bicycle: He then holds up a small silver piece and begins sticking it into the chain of the bike. Next, he takes a black utensil, moves the pedals around and takes the chain completely off. he

Ending1: finally show how to fasten the chain to his bike, about ten steps after that he grabs his black leather carry on bike and begins to attach the weight. Ending2: then takes a box with a new chain in it and puts it back on the bike and begins tightening the chain. Ending3: moves the bike slowly around until the end. Ending4: applies wax to the piece and lines it together to make a bike.

Answer format: ending1/ending2/ending3/ending4