3. A discrete first-order Markov source generates two dependent symbols A and B with conditional probabilities: P(A|A) = 0.8 P(AB) = 0.6 P(BA) = 0.2 P(B|B) = 0.4 a) Determine the probabilities of the symbols A and B. b) Determine the entropy of the source. c) Determine the entropy of the adjoint source