Please choose the correct ending to complete the given sentence: Cleaning sink: Then a man shows the first step to clean a bathroom sink is to fill water and then drain it. the second step

Ending1: is to go back to the other side and drain the sink. Ending2: involves a vacuum to clean snow off the window sill while the man talks to the camera. Ending3: is to apply plenty of cleanser, rinse the sink and rinse it out in the sink. Ending4: is to put gloves, and the third step is to wet a cloth and put abrasive power to rub the bathroom sink.

Answer format: ending1/ending2/ending3/ending4