Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep were obtained on a typical day. Researchers found that visually impaired students averaged 8.95 hours of sleep, with a standard deviation of 2.11 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed.

1. What is the probability that a visually impaired student gets less than 6.9 hours of sleep?________
2. What is the probability that a visually impaired student gets between 6.2 and 10.5 hours of sleep?________
3. Thirty percent of students get less than how many hours of sleep on a typical day?________