The mean amount of time it takes a kidney stone to pass is 15 days and the standard deviation is 6 days. Suppose that one individual is randomly chosen. Let X = time to pass the kidney stone. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected person with a kidney stone will take longer than 12 days to pass it.  c. Find the minimum number for the upper quarter of the time to pass a kidney stone.  days.

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