Describe common posture problems.

Almost everybody exhibits bad posture during some parts of the day. Among the most common problems are flexed or sloping shoulders, a rounded upper back and a chin that juts too high or forward. Many people tend to extend their necks like turtles (especially when doing computer work), which can really stress the neck.

hope this helps :)

be confident on yourself. ignore such fools and move on ; )

teens need 8-10 hours of sleep. it kind of depends on what time you get up. but prob around 10 or 11 p.m. or 11 or 11: 30 p.m.