Please choose the correct ending to complete the given sentence: Spinning: A group of women are inside a dark gym. they

Ending1: are all riding on recumbent bikes. Ending2: are then shown synchronizing up and down on the bars on one side. Ending3: all have fencing gear on as they bounce up and down on the mats. Ending4: are bouncing back and forth on a loose mat.

Answer format: ending1/ending2/ending3/ending4