Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to install a cpu cooler in an amd motherboard [title] Before opening your computer, make sure that it is unplugged and in a non-static surface. [step] Wood or a glass table is ideal. [title] Turn off the computer and move it to the non-static surface.

Ending1: [step] Put the cooler on a u-shape. You can also place your motherboard on a flat surface and slowly move your car in step 1. Ending2: [step] Use your screw-driver to open the case panel. [title] Remove the panel and take a look at the mother board. Ending3: [step] This will allow you to see more of the cpu cooler without actually seeing it and instead wants to see the motherboard cooler in full visibility. [title] Right click a cpu cooler and select save as. Ending4: [step] Seat your pc in the appropriate spot. Make sure the motherboard is at least 175 degrees upright.

Answer format: ending1/ending2/ending3/ending4