Please choose the correct ending to complete the given sentence: Playing piano: A man and a woman are standing by a piano. The man and the woman play the piano together. they

Ending1: stop and smile to each other. Ending2: switch places and continue playing the piano. Ending3: turn and play another part of the piano. Ending4: finish and look at the piano.

Answer format: ending1/ending2/ending3/ending4