3. Starting with the matrix A, the following sequence of row operations produces the matrix B. • R₂ is replaced by R₂ - 3₁. • R3 is replaced by R3. • R4 is replaced by R4 + 5R₂. From matrix B, the following sequence of row operations produces the matrix C. • R4 is swapped with R₂. R₁ is replaced by -2R₁. If C = 2000 3 -2 4 -3 2 -1 0 0 - 2 1 1 3 find det A and det B.

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