Assume that an adult female is randomly selected Suppose females have pulse rates that are normally distributed with a mean of 75 0 beats per minute and a standard deviation of 12.5 beats per minute. Find the probability of a pulse rate between 61 beats per minute and 68 beats per minute (Hint: Draw a graph.) The probability is (Round to four decimal places as needed )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 or 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 (Round to four decimal places as needed )