Please choose the correct ending to complete the given sentence: Using the rowing machine: A man is located inside a gym. He is talking while several people are using rowing machines. he

Ending1: is working out on the machine as people record him from a distance. Ending2: asks them questions while he is sitting on the machines. Ending3: then practices rowing with a girl multiple times. Ending4: shows the mechanics of how the machines work.

Answer format: ending1/ending2/ending3/ending4