Essay
Consider the adjacency matrix for a graph that is shown below. Answer the following questions by examining the matrix and its powers only, not by drawing the graph. Show your work in a way that makes your reasoning clear.
(a) How many walks of length 2 are there from to ?
(b) How many walks of length 2 are there from to ?
(c) How many walks of length 2 are there from to ?
Correct Answer:

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