Please choose the correct ending to complete the given sentence: Assembling bicycle: He is putting training wheels on the back wheel of the bike. He puts the front tire on the bike. he

Ending1: puts pry bars over the wheel had on the back wheel. Ending2: stands up on the elbow to put the pedal on. Ending3: applies the handle bars to the back wheel to secure the spokes. Ending4: puts the handlebars on the bike.

Answer format: ending1/ending2/ending3/ending4