Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to colour your computer [title] First, disconnect all cables in the back of your computer. [step] Make sure there are no adapters, wireless antennae, or flash drives in the back of it. [title] Open up the computer case and carefully remove all of the hardware.

Ending1: [step] Aside from backing up the software, you should also remove any plug-ins. [title] Remove and clean external hardware, and place them on a clean, white paper towel to dry completely. Ending2: [step] Start by unplugging all of the colorful cables from everything they are connected to. Make note of where they were connected, take a picture if you need to to aide you in rebuilding the computer. Ending3: [step] Gently sand any metal or plastic parts in the case, including the screws that hold it together. [title] Next, remove the connections to the main computer. Ending4: [step] If you have any graphics cards with needed black and white cables, be sure to disconnect them from the computer and put them in a different place out of easy access. [title] Remove the usb cable from the back of the computer case.

Answer format: ending1/ending2/ending3/ending4