Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 149 minutes with a standard deviation of 16 minutes. Consider 49 of the races. Give the distribution of X. (Round your standard deviation to two decimal places.)Find the probability that the runner will average between 146 and 150 minutes in these 49 marathons. (Round your answer to four decimal places.) Find the 80th percentile for the average of these 49 marathons. (Round your answer to two decimal places.) Find the median of the average running times.