babies need about 14 to 17 total hours of sleep per day (and usually wake every two or three hours to chow down). By about 4 months, most babies sleep 10 to 12 hours at night (with a feeding or two) and nap for three to five hours of sleep a day spaced between two or three nap.
children three to five years old need 11 to 13 hours, children five to 10 years old need 10 to 11 hours, and adolescents 10 to 17 years need eight-and-a-half to nine-and-a-half hours of sleep each night.
The average amount of sleep that teenagers get is between 7 and 7 ¼ hours. However, they need between 9 and 9 ½ hours (studies show that most teenagers need exactly 9 ¼ hours of sleep). Teenagers do not get enough sleep for a number of reasons.
While sleep requirements vary slightly from person to person, most healthy adults need between 7 to 9 hours of sleep per night to function at their best. Children and teens need even more. And despite the notion that our sleep needs decrease with age, most older people still need at least 7 hours of sleep.
Sleep talking is a sleeping disorder such as talking during sleep without being aware of it. Sleep talking can involve complete gibberish or mumbling. The good news is that for most people it is a rare.
If you don't go to sleep you will lose focus and more here is a video about what happens when you don't sleep.