16. Which of the following matrices is in reduced-row echelon form? 15 2 0 0 4 Го о 0 от [1 B. 0 1 0 - 3 A. 0 1 - 1 2 C. 0000 0 0 1 0 1 1 6 0000 5 , compute 6A + 4B. 6 18 -42 1 18 C. 16 36 24 -16 1 2 - 6 17. If A = [42 1 18 16 A. 36 - 24 726 3 6 and B = B. 3 0 - 1 2 3 0 -5 42 1 36 24 1082 D. 0 0 0 0 0019 30 1 36 36 - D. 18 36

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