(Solved):
Consider the stochastic matrices M1=0000000 ...
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Consider the stochastic matrices M1?=??0?0?0?0???0?0?0?0???,M2?=??0?0?0?0???0?0???0???,M3?=??0???0?0???0?0???0???, where all entries marked with ? are greater than 0 . For each of them, find the number of communicating classes, and decide if they are closed (briefly justify).