Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to change between tower and desktop orientations in a compaq evo tower [title] Remove the access panel. [step] On the back of the computer, use a screwdriver to remove the two screws that hold the access panel in place, then slide and lift it away from you. [title] Remove the front panel.

Ending1: [step] There are 3 panel behind the computer. Make sure you don't set the screws to the left or right of the header panel. Ending2: [step] Press in on the two plastic tabs which are next to the underlying green arrows, then rotate it away from you and lift it out. [title] Rotate the cd and floppy drives to the horizontal orientation. Ending3: [step] Lay a large piece of its back on a solid table. Any materials that would not fit under the panel need to be removed. Ending4: [step] The front panel is at the back of the computer, typically located on the front side of the desk. Locate it by looking at the side panel.

Answer format: ending1/ending2/ending3/ending4