markov chain question please help c and d

Let Xg, X1, be a Markov chain 1with transition matrix 3 1/3 1/3 1/3 where the states of Xi are 1, 2, and 3. And the initial distribution of XI] is {1/2, [1, 1/2). Find the following values (a) P(X2 =1|X1 = 3) (b) P(X2 = 31X1 = 3] (C) POE = 3|X2 = 1) (d) 5112:}