Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to use a lighter [title] Hold the lighter in your dominant hand. [step] Locate the sparkwheel and the ignition button. [substeps] The spark wheel is made of serrated, hardened steel wire.

Ending1: The ignition button either has batteries or the ignition key is yellow. It is located on the right side of the ignition knob. Ending2: When it is rotated with sufficient speed and force, it will strike a bar of flint within the lighter, creating a spark. The ignition button, when pressed, releases the gas valve to the fuel tank. Ending3: It is turned slightly inward and makes a metallic popping sound when you press it. The ignition button releases the ignition switch and the ignition switch. Ending4: When this comes out of your hand, it will melt the metal; instead, you'll hold the flame in your non-dominant hand, and the ignition button will remain submerged in the flint. You'll punch the ignition button many times.

Answer format: ending1/ending2/ending3/ending4