Please choose the correct ending to complete the given sentence: Spinning: A bunch of people are inside a dimly lit gym. They are riding recumbent bikes while being led. they

Ending1: start doing sit ups as they do their exercise. Ending2: ride around the track and participate in several competitions. Ending3: alternate bumping into each other as they go on. Ending4: clap their hands and pedal quickly.

Answer format: ending1/ending2/ending3/ending4