Please choose the correct ending to complete the given sentence: Assembling bicycle: The bike chain is fastened back together on the bike gears using a specialized tool. The person inspects the newly replaced chain by hand. the person

Ending1: points to different areas on the bike gearing with the bike on the rack after the job is complete. Ending2: then takes down the new chain. Ending3: then removes the new chain and remounts the bike. Ending4: fixes the old chain onto the wheel link bike.

Answer format: ending1/ending2/ending3/ending4