Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to stretch your it band [title] Support yourself against a wall with one hand. [step] If you can't get near a wall, use a chair or countertop. Just make sure you're holding onto something sturdy so you don't fall or knock your support over while stretching.

Ending1: [title] Position your hands so that the back fingers are touching. [step] Your center of mass should be perpendicular to the wall. Ending2: Whatever room the injured person's in, you'll need to protect your body from possible falls. [substeps] If the person is sleeping on the floor or on a couch, take a couple of steps out from the wall as you lift your foot. Ending3: [title] Place a towel or cushion over you and the floor. [step] Place a towel or cushion over your shoulder as you stand and brace against it with both hands. Ending4: [title] Cross your right leg over your left leg at the ankle. [step] Your right leg should be in front, and only the edge of your right foot should be touching the floor.

Answer format: ending1/ending2/ending3/ending4