Let X be a random variable with the following probability distribution. Value x of X P(X=x) -2 0.05 - 1 0.30 0 0.30 0.30 2 0.05 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X ) of X. X E(X) = 1 (b) Find the variance Var(X ) of X. Var (X) =