Please choose the correct ending to complete the given sentence: Fixing bicycle: A bike then appears and the person starts to move the seat back and forth illustrating its looseness. the tool

Ending1: is then inserted into the seat and it begins to get tightened. Ending2: alternates between methods using the brakes as well as table. Ending3: then is shown that is important in assembling the bike and he adds parts such as out the tire, pedals, empty end wheels and bucket. Ending4: finally stops and individual gives it easy lift followed by the individual measuring it again.

Answer format: ending1/ending2/ending3/ending4