Suppose that the duration of a particular type of criminal trial is known to be normally distributed with a mean of 16 days and a standard deviation of 5 days. Let X be the number of days for a randomly selected trial. Round all answers to 4 decimal places where possible. a. What is the distribution of x2 x - N([:],[:]) b. If one of the trials is randomly chosen, find the probability that it lasted at least 15 days. [3 c. If one of the trials is randomly chosen, find the probability that it lasted between 15 and 19 days. i: d. 78% of all of these types of trials are completed within how many days? (Please enter a whole number) C]