The average birth weight of domestic cats is about 4 ounces. Assume that the distribution of birth weights is Normal with a standard deviation of 0.5 ounce. a. Find the birth weight of cats at the 80th percentile. b. Find the birth weight of cats at the 20th percentile. Whales have one of the longest gestation periods of any mammal. According to a website, the mean gestation period for a whale is 13 months. Assume the distribution of gestation periods is Normal with a standard deviation of 1.2 months. a. Find the standard score associated with a gestation period of 11.8 months. b. Using the Empirical Rule and your answer to part a, what percentage of whale pregnancies will have a gestation period between 11.8 and 13 months? c. Would it be unusual for a whale to have a gestation period of 17 months? Why or why not?