Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean p = 151 days and standard deviation o = 16 days. Complete parts (a) through (c). (a) What is the probability that a randomly selected pregnancy lasts less than 145 days? The probability that a randomly selected pregnancy lasts less than 145 days is approximately (Round to four decimal places as needed.) (b) What is the probability that a random sample of 13 pregnancies has a mean gestation period of less than 145 days? The probability that the mean of a random sample of 13 pregnancies is less than 145 days is approximately (Round to four decimal places as needed.) (c) What is the probability that a random sample of 48 pregnancies has a mean gestation period of less than 145 days? The probability that the mean of a random sample of 48 pregnancies is less than 145 days is approximately . (Round to four decimal places as needed.)