please solve

Section 6.2: Problem 1 (1 point) Suppose the random variable x is best described by a normal distribution with p = 21 and o = 4. Find the zscore that corresponds to each of the following x values. (a)x=15 z: (b)x=38 Z: (c)x=23 z: (d)x=18 z: (e)x=31 z: (f) x=25 z: Section 6.2: Problem 7 (1 point) The top-selling Red and Voss tire is rated 70000 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 82000 miles and a standard deviation of 6000 miles. A. What is the probability that the tire wears out before 70000 miles? Probability = B. What is the probability that a tire lasts more than 85000 miles? Probability =