Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u =233 days and standard deviation 6 =12 days. Complete parts (a) through (c). (a) What is the probability that a randomly selected pregnancy lasts less than 229 days? The probability that a randomly selected pregnancy lasts less than 229 days is approximately D. (Round to four decimal places as needed.) (b) What is the probability that a random sample of 16 pregnancies has a mean gestation period of less than 229 days? The probability that the mean of a random sample of 16 pregnancies is less than 229 days is approximately (c) What is the probability that a random sample of 38 pregnancies has a mean gestation period of less than The probability that the mean of a random sample of 38 pregnancies is less than 229 days is approximately . (Round to four decimal places as needed.) 229 days? . (Round to four decimal places as needed.)