1. (a) 0.186 (b) 32, 32 (c) 32, 3.2, (d) 0.1056
2. (a) P_A(0) = 0.3, P_A(1) = P_A(2) = 0.35; P_B(0) = P_B(2) = 0.3, P_B(1) = 0.4 (b) 2.05 (c) 46 (d) No
3. (a) 1/156 (b) 0.846 (c) 1.03
4. (a) 296 (b) -0.97 (c) 39