Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to use a windows phone [title] Turn the power on and off. [step] To turn the phone on, hold the power button in the middle of the right edge until the screen starts. To turn it off, hold the power button until you see slide to power off, then swipe down on your phone.

Ending1: [title] Familiarize yourself with your phone's buttons. [step] Windows phones have three soft touch buttons below the screen. Ending2: [title] Press and hold the power button 2 times. [step] You should hear a familiar beep, as if someone is trying to turn off the phone. Ending3: [title] Turn the power back on and swipe down on the screen. [step] When you see the power switch go in the bottom right, swipe up to turn the switch off. Ending4: [title] Wait for the power slider to slide to the left. [step] This should take care of the power to turn off, and turn on the power to your phone again once the power switch is flipped and the screen begins to shut off.

Answer format: ending1/ending2/ending3/ending4