Hello tutor can you help me for these questions?

(1 point) The top-selling Red and Voss tire is rated 60000 miles, which means nothing. In fact, the distance the tires can run until wear-out is a normally distributed random variable with a mean of 74000 miles and a standard deviation of 6000 miles. A. What is the probability that the tire wears out before 60000 miles? Probability = B. What is the probability that a tire lasts more than 82000 miles? Probability =(1 point) 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 obtained on a typical day. Researchers found that visually impaired students averaged 8.04/ hours of sleep, with a standard deviation of 2.97/ hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. (a) . What is the probability that a visually impaired student gets less than 6 hours of sleep? answer: (b) . What is the probability that a visually impaired student gets between 6.9 and 10.88| hours of sleep? answer: (c) . Twenty percent of students get less than how many hours of sleep on a typical day? answer: hours