3. Suppose that we have a Markov chain with states 1, 2, 3, 4 has the fol- lowing transition probability matrix: 1- t 0 0) 0 P = 0 1- t t 1 0 0 (a) What must be the value of r? Why? (b) Draw the state diagram (i.e., graph or net) and indicate the transi- tion probabilities on it. (c) Classify the states for any possible value of t and r