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2. The common fruit fly Drosophila melanogaster is the most studied organism in genetic research because it is small, is easy to grow, and reproduces rapidly. The length of the thorax (where the wings and legs attach) in a population of male fruit flies is approximately Normal with mean 0.700 millimeters (mm) and standard deviation 0.074 mm. a. What proportion of flies have thorax length less than 0.5 mm? b. What proportion have thorax length greater than 0.8 mm? c. What proportion have thorax length between 0.5 mm and 0.8 mm