Please choose the correct ending to complete the given sentence: Rope skipping: Kids are jump roping in a gym. a man

Ending1: in some uniforms is talking to the camera. Ending2: is standing in front of them holding a clipboard. Ending3: is jump roping from a platform. Ending4: sits in a chair and a kid jump roping in front of him.

Answer format: ending1/ending2/ending3/ending4