Please choose the correct ending to complete the given sentence: Playing pool: First different kinds pool balls are shown lined up. then the boy

Ending1: goes to the mirror and swings the four balls in. Ending2: goes into all of the different pool balls. Ending3: grabs a pool stick and tries their tubes. Ending4: starts to play pool all by himself with the balls.

Answer format: ending1/ending2/ending3/ending4