Please choose the correct ending to complete the given sentence: Playing piano: A man is seated at a piano. he

Ending1: starts playing a tune, looking back and forth at the keys as he plays. Ending2: is singing into the microphone in his hands as he plays. Ending3: is playing the piano with two sticks. Ending4: pulls a rod and plays as he makes notes on a piece of paper.

Answer format: ending1/ending2/ending3/ending4