2. (10 points) Consider a continuous-time Markov chain with the transition rate matrix -4 2 2 Q = 3 -4 5 1 0-5 (a) What is the expected amount of time spent in each state? (b) What is the transition probability matrix of the embedded discrete-time Markov chain? (c) Is this continuous-time Markov chain irreducible? (d) Compute the stationary distribution for the continuous-time Markov chain and the em- bedded discrete-time Markov chain and compare the two.