Please choose the correct ending to complete the given sentence: Assembling bicycle: A man is at a table inside a shop. He is showing the components of a bike wheel. he

Ending1: takes some parts off and puts them back on again. Ending2: shows how to insert screws into the tire. Ending3: begins by cutting the spokes on the wheel and tightening them to make them comfortable. Ending4: then puts it on a bracket, and shows how to fasten it.

Answer format: ending1/ending2/ending3/ending4