Determine if the recurrent classes {1,2} , {3,4} and {5,6} is periodic or aperiodic. 0.9 0.4 0.4 0.1 0.2 2 3 5 0.2 0.6 0.7 0.2 0.3 Then, assume that the process starts in state 3, what is the probability of reaching the recurrent class {1,2}