The lengths of a particular animal's pregnancies are approximately normally distributed, with mean is = 276 days and standard deviation 6 = 8 days. (a) What proportion of pregnancies lasts more than 290 days? (b) What proportion of pregnancies lasts between 274 and 282 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 262 days? (d) A \"very preterm" baby is one whose gestation period ls less lhan 258 days. Are very preterm babies unusual? a Click the icon to View a table of areas under the normal curve. (a) The proportion oi pregnancies that last more than 290 days Is D. (Round to tour decimal places as needed.) (in) The proportion ot pregnancies that last between 274 and 282 days is D. (Round to four decimal places as needed.) (6) The probability that a randomly selected pregnancy lasts no more than 262 days is D. (Round to four decimal places as needed.) (d) A \"very preterm\" baby Is one whose gestation period is less than 258 days. Are very preterm babies unusual? Th . , . . . E e probability of this event is D, so it be unusual because the probability is '1] than 0.05. (Round to tour decimal places as needed.) Enter your answer in each of the answer boxes