What's the normal distribution of 1-p(z>12.3)

The mean amount of time it takes a kidney stone to pass is 16 days and the standard deviation is 6 days. Suppose thatl 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( 16 6 b. Find the probability that a randomly selected person with a kidney stone will take longer than 15 days to pass it. c. Find the minimum number for the upper quarter of the time to pass a kidney stone. days