Please choose the correct ending to complete the given sentence: Mowing the lawn: A man is mowing the grass in his yard. a little boy

Ending1: is also mowing the lawn. Ending2: is using a plastic mower next to him. Ending3: walks through the grass and meet him, talking about the mowing system. Ending4: watches him from the doorway and knocks into the man.

Answer format: ending1/ending2/ending3/ending4