Let S = (-2, -1, 0, 1, 2) be a sample space with P(-2) = P(-1) = 0.1, P(0) = P(1) = B, and P(2) = 0.3. Calculate B and then calculate E(S). a) B = 0.1, E(S) = 0.4 b) B = 0.2, E(S) = 0.6 c) B = 0.3, E(S) = 0.5 d) B = 0.4, E(S) = 0.7