The mean incubation time for a type of fertilized egg kept at 100.5°F is 21 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days. (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 between 19 and 21 days? (c) What is the probability that a randomly selected fertilized egg takes over 25 days to hatch? (a) The probability that a randomly selected fertilized egg hatches in less than 17 days is nothing. (Round to four decimal places as needed.)