Please choose the correct ending to complete the given sentence: Mowing the lawn: A man is outside in his front yard. he

Ending1: is taking the mower in circles around to mow the grass. Ending2: is using a heavy squeegee to wash a pair of unpainted grass-scraper's. Ending3: is using a lawn mower over a long piece of grass. Ending4: is using a push mower to mow the grass.

Answer format: ending1/ending2/ending3/ending4