Multi-choice problem: Continue writing the next sentence in this paragraph:

How to do a wall sit with shoulder rotation
Stand with your back to a wall.
Align your feet with your hips and begin walking your legs away from the wall.
Slide your back carefully down the wall until your knees are positioned at a right angle.

Possible answers:
a). Place both arms on the edge of the wall, both for balance and to steady you as you rotate. Place your hands directly below your shoulders while tilting slightly forward..
b). Your feet should still be facing outwards and aligned with your hips, and most of your weight should be supported by your heels. Now raise your arms so they're touching the wall at your shoulders..
c). As you become more familiar with the sensation of sitting on a wall, however, you need to rise higher to maintain your balance. Keep your shoulder blades down while positioning your arms..
d). " out " your hands in front of you when you feel comfortable. This exercise is typically done for a total of 15 to 20 repetitions but you can also do a wall sit for a total of 15 repetitions..
b).