Please choose the correct ending to complete the given sentence: Using the rowing machine: A man is standing and walking in the gym. The man sat on the rowing machine and put his feet on the pedal. the man

Ending1: walked again in the gym. Ending2: hit the pedal with his hand. Ending3: drop the hose on the treadmill and take a practice step. Ending4: began to pull the belt.

Answer format: ending1/ending2/ending3/ending4