please help with an explanation

AL LIMIT Question 7, 6.4.17-T HW Score: 36.67%. 3.67 of 10 O Part 1 of 3 points O Points: 0 of 1 Save An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 140 lb and 201 lb. The new population of pilots has normally distributed weights with a mean of 148 lb and a standard deviation of 33.5 lb. Click here to view page 1 of the standard normal distribution. Click here to view page 2 of the standard normal distribution. a. If a pilot is randomly selected, find the probability that his weight is between 140 lb and 201 lb. The probability is approximately (Round to four decimal places as needed.)