Question: (a) Draw the graph corresponding to the 6 7 incidence matrix whose nonzero (/, j) entries equal 1 if j = i and -

(a) Draw the graph corresponding to the 6 × 7 incidence matrix whose nonzero (/, j) entries equal 1 if j = i and - 1 if j = i + 1, for i = 1 to 6.
(b) Find a basis for its kernel and cokemel.
(c) How many circuits are in the digraph?

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