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Find the rank of each of the following matrices from its echelon matrix, and comment on the question of nonsingularity. (a) A = (b)

Find the rank of each of the following matrices from its echelon matrix, and comment on the question of nonsingularity. (a) A = (b) B = 1 0 -1 0 5 1 39 00 0 To -1 3 1 6 -4 2 10. (c) C = (0) D = 7 6 3 3 0121 8008 279 1 1 0 059 1 -3

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