(b) Posterior probability Consider the belief network shown above, with observed nodes B and D and hidden nodes A and C. Compute the posterior probability P(a, clb, d) in terms of the CPTs of the belief network-that is, in terms of Pla), P(ba), P(cla, b) and P(dla, c). (c) Posterior probability Compute the posterior probabilities P(alb, d) and P(clb, d) in terms of your answer from part (b). In other words, in this problem, you may assume that P(a, clb, d) is given. (b) Posterior probability Consider the belief network shown above, with observed nodes B and D and hidden nodes A and C. Compute the posterior probability P(a, clb, d) in terms of the CPTs of the belief network-that is, in terms of Pla), P(ba), P(cla, b) and P(dla, c). (c) Posterior probability Compute the posterior probabilities P(alb, d) and P(clb, d) in terms of your answer from part (b). In other words, in this problem, you may assume that P(a, clb, d) is given