Question: Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean \(\mu \) = 390 lb and \(\sigma \) = 65 lb.

a) Find the probability that an individual male Siberian tiger will weigh more than 450 lb.

b) Find the probability that a random sample of 4 male Siberian tigers will have a sample mean weight more than 450 lb.