help pls 18

The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation of 15 days, a. Find the probability of a pregnancy lasting 309 days of longer. 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 premature. Click to view page 1 of the table, Click to view page 2 of the table. a. The probability that a pregnancy will last 309 days or longer is 0.0038 (Round to four decimal places as needed ) b. Babies who are born on or before days are considered premature (Round to the nearest integer as needed )