Make a point of trying to keep good posture during these, with your back straight and your shoulders back when you're supposed to keep your torso upright.
1. Lotus Position Stretch
2. Upper Back Stretch
3. Spine Stretch
4. Hip Adductor Stretch
5. Pectoral Muscles Stretch
For this one, find a convenient doorway. You can either stretch both sets of muscles at once, or one at a time, depending on the width of the doorway: