Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u = 111 days and standard deviation o = 5 days. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the probability that a randomly selected pregnancy lasts less than 109 days? The probability that a randomly selected pregnancy lasts less than 109 days is approximately 0.3446 . (Round to four decimal places as needed.) (b) What is the probability that a random sample of 12 pregnancies has a mean gestation period of 109 days or less? The probability that the mean of a a random sample of 12 pregnancies is less than 109 days is approximately 0.0823 . (Round to four decimal places as needed.) (c) What is the probability that a random sample of 36 pregnancies has a mean gestation period of 109 days or less? The probability that the mean of a a random sample of 36 pregnancies is less than 109 days is approximately 0.4286. (Round to four decimal places as needed.)