please answer b

An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 140 lb and 191 lb. The new population of pilots has normally distributed weights with a mean of 145 lb and a standard deviation of 29.5 lb. Click here to View page 1 of the standard normal distribution. Click here to View page 2 of the standard normal distribution. (I) a. If a pilot is randomly selected, nd the probability that his weight is between 140 lb and '191 lb. The probability is approximately 0.5081 . (Round to four decimal places as needed.) [3. if 35 different pilots are randomly selected, nd the probability that their mean weight is between 140 lb and 19'] lb. The probability is approximately D. (Round to four decimal places as needed.)