Please choose the correct ending to complete the given sentence: Elliptical trainer: An elderly man is using an elliptical trainer inside a gym. he

Ending1: uses it to walk against the wall. Ending2: walks to and fro, trying to exercise inside while also using the elliptical trainer. Ending3: is using it to walk, speed, and perform various way to flip. Ending4: pedals and pushes back and forth as he talks to the person with the camera.

Answer format: ending1/ending2/ending3/ending4