Please choose the correct ending to complete the given sentence: Tennis serve with ball bouncing: A man dressed in a white polo is standing outside of a building talking with two tennis balls in his hand. the man

Ending1: then sets the balls against the wall behind him and hits one with the tennis ball, the ball accidentally hits both of them. Ending2: then goes inside, the tennis balls go from hand to hand and he hits a tennis ball, then he throws the ball on the ground and continues talking. Ending3: then walks towards a young female tennis player and starts to give her instructions. Ending4: then picks up both balls and turns them around to demonstrate the position of the balls.

Answer format: ending1/ending2/ending3/ending4