Please choose the correct ending to complete the given sentence: Smoking a cigarette: A boy sits in a room and talks to a camera while holding a demonstrating how to use an electronic cigarette. the boy

Ending1: holds the cigarette in his mouth, then plays a game of rock paper scissors with the camera. Ending2: presses the red button on the black pack and blows the smoke. Ending3: unscrews the cigarette to reveal the inside mechanism. Ending4: puts the machine on his lap and touches his screen, then he removes his hand.

Answer format: ending1/ending2/ending3/ending4