The mean incubation time for a type of fertilized egg kept at 100.1?°F is 19 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day.
?(a) What is the probability that a randomly selected fertilized egg hatches in less than 17 ?days?
?(b) What is the probability that a randomly selected fertilized egg hatches between18 and 19 days?
?(c) What is the probability that a randomly selected fertilized egg takes over 21 days to? hatch?