The mean amount of time it takes a kidney stone to pass is 14 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 10 days to pass it.

c. Find the minimum number for the upper quarter of the time to pass a kidney stone.days.