Fish story: According to a report by the U.S. Fish and Wildlife Service, the mean length of sixyearold rainbow trout in the Arolik River in Alaska is 480 millimeters with a standard deviation of 40 millimeters. Assume these lengths are normallyr distributed. (a) What proportion of sixyearold rainbow trout are less than 446 millimeters long? (b) What proportion of sixyearold rainbow trout are between 405 and 505 millimeters long? (c) Is it unusual for a sixyearold rainbow trout to be less than 415 millimeters long? Round the answers to at least four decimal places