Using Gaussian elimination / Gauss-Jordan row reduction, determine if the given matrix B is invertible. If it is, give its inverse B-¹ and write B as a product of elementary matrices. 1 1 2 0 2 13 2 1 0 4 (b) B= -- 324 -# 0 (a) B = 20-3 8 433 25 11 -12/

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