Please choose the correct ending to complete the given sentence: Assembling bicycle: A man is standing next to a bicycle on a pole. He moves two tires off a box. he

Ending1: uses the gate on the bike to open it. Ending2: pushes the handle bars across the tires to tighten them into place. Ending3: grips a jack hammer and screws it on. Ending4: starts assembling the bike and putting the tires on the bike.

Answer format: ending1/ending2/ending3/ending4