The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. In a letter to an advice column, a wife claimed to have given birth 307 days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting 307 days or longer. What does the result suggest? b. If the length of pregnancy is in the lowest 2%, then the baby is premature. Find the length that separates premature babies from those who are not considered premature. a. The probability that a pregnancy will last 307 days or longer is (Round to four decimal places as needed.) What does the result suggest? O A. The result suggests an uncommon but not significant event occurred. O B. The result suggests that either a very rare event occurred or the husband is not the father. O C. The result suggests that the husband is the father. O D. The result suggests the event did not occur. b. Babies who are born on or before days are considered premature. (Round to the nearest integer as needed.)