Assume the average selling price for houses in a certain county is $325,000 with a standard deviation of $40,000. a. Determine the coefficient of variation. b. Calculate the z-score for a house that sells for $310,000 that includes 95% of the homes around the mean. prices that includes at least 94% of the homes around c. Using the empirical rule, determine the range of prices d. Using Chebyshev's Theorem, determine the range of the mean.