Please choose the correct ending to complete the given sentence: Assembling bicycle: A person then comes and removes the chain from the bike and places it on the ground. The man then takes out a yardstick and begins to measure certain parts of the bike. pieces

Ending1: are then removed and tightened with the wrench and rings are placed inside by where the chain goes. Ending2: of the chain are then drawn over the handlebars. Ending3: of metal then decorate the frame and he hangs them up. Ending4: are then shown and the brakes are adjusted to minimize rough materials and dirt.

Answer format: ending1/ending2/ending3/ending4