The length oi human pregnancies is approximately nonnal with mean p.= 266 days and standard deviation 5 =16 days. Complete parts {a} through 6). Click here to View the standard normal distribution table {page 1L Click here to View the standard normal distribution table (page 2}; [a] What is the probability that a randomly selected pregnancy lasts less than 261 days? The probability that a randomly selected pregnancy lasts less than 261 days is approximately D. {Round to four decimal places as needed.)