Please choose the correct ending to complete the given sentence: Fixing bicycle: A man gives a tutorial on how to change a bike tube. the wheel

Ending1: at the back of the tube reverses and reverts back to the front. Ending2: is taken off, tire irons are put in, and the tube is removed. Ending3: pans to reveal the finished park. Ending4: is scraped, he puts gel over the site, then wraps it with big cloth on both wheels.

Answer format: ending1/ending2/ending3/ending4