Determine whether the following matrices are in reduced echelon form. If a matrix is not in reduced echelon form give a reason. (a) (c) (e) (i) 1 0 1 1 2 5 6 0 1 3-7 0 1 0 0 1 0 0 1 0 0 1 0 0 2 3 1 0 0 0 1 0 1 0 1 0 4 5 69 9 3 0 6 0 0 1 (b) (d) 1 2 0 0 1 (h) 20 1 (f) 0 0 1 4 0 40 4 7 0 5 2 9 5 0 0 0 0 1 0 0 0 2 0 0 0 1 2 3 2 6 1 3

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Q: 1 7 (a) | 2 3 5 1 -10

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A: We Know that

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