2. Which matrix is not in reduced row echelon form? (1 0 0 2 0 10 3 0 0 1 2, (1 2 0 0 0 0 1 0 0 0 0 1 (1 0 1 0\ 0 10 0 0 0 1 1 (1 0 0 0V 0 1 2 0 0 0 0 1

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