B = rref (B) = -3 -11 2 3 -1 -2 -4 2 (a) Find the reduced row echelon form of the matrix B (b) How many pivot columns does B have? (c) Do the vectors in the set -11 2 [CH]} you can explain and justify your answer. choose (d) Are the vectors in the set -11 OOB -3 independent? Be sure you can explain and justify your answer. choose 2 span R³ ? Be sure -2 linearly 2 û

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