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4. The length of the thorax (where the wings and the legs attach) of the common fruit fly in a population of male fruit flies is approximately Normal with mean 0.800 millimeters (mm) and standard deviation 0.078 mm. (a) What proportion of flies have thorax length less than 0.65 mm? (b) What proportion of flies have thorax length greater than 0.95 mm? (c) What proportion of flies have thorax length between 0.65 mm and 0.95 mm? (d) What is the interquartile range (IQR) for this Normal distribution