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Part 2. Mean, Variance, and Standard Deviation of Discrete Distribution 25 points 2. The discrete random variable X has the probability distribution shown below. X -2 0 1 3 P(X=x) 0.32 0.27 a 0.24 Calculate a. the value of a b. E(X) C. E(X) d. E(2X +5) e. Var(X) f. Var(3x -8)