Please choose the correct ending to complete the given sentence: Playing rubik cube: A young man solves a cube puzzle while a man stand on front him. then

Ending1: , the young man solve the cube puzzle, then he stands on front an explain. Ending2: , a man writes on a paper and shows the young man. Ending3: , the young man solves a puzzle, then he stands on front a man. Ending4: , the man break a cube and solve it by himself and the person by side.

Answer format: ending1/ending2/ending3/ending4