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6. Using the company records for the past 500 working days, the manager of, Honto Motors, a suburban automobile dealership, has summarized the number of cars sold per day into the following table: Number of cars sold per day Frequency 0 40 100 142 66 36 30 26 20 16 14 8 2 A. Form the probability mass function for the random variable X that represents the number of cars sold per day. (12 points) B. Compute the mean, variance, and standard deviation of the random variable X. (3 points) C. What is the probability that on any given day, at least six cars will be sold? (1 point)