Please help, do not understand this concept.

An airliner carries 400 passengers and has doors with a height of 72 in. Heights of men are normally distributed with a mean of 69.0 in and a standard deviation of 2.8 in. Complete parts?(a) through?(d).

An airliner carries 400 passengers and has doors with a height of 72 in. Heights of men are normally distributed with a mean of 69.0 in and a standard deviation of 2.8 in. Complete parts (a) through (d). a. If a male passenger is randomly selected, find the probability that he can fit through the doorway without bending. The probability is. (Round to four decimal places as needed.) b. If half of the 400 passengers are men, find the probability that the mean height of the 200 men is less than 72 in. The probability is (Round to four decimal places as needed.) c. When considering the comfort and safety of passengers, which result is more relevant: the probability from part (a) or the probability from part (b)? Why? O A. The probability from part (a) is more relevant because it shows the proportion of flights where the mean height of the male passengers will be less than the door height. O B. The probability from part (a) is more relevant because it shows the proportion of male passengers that will not need to bend. O C. The probability from part (b) is more relevant because it shows the proportion of flights where the mean height of the male passengers will be less than the door height. O D. The probability from part (b) is more relevant because it shows the proportion of male passengers that will not need to bend