4. Please use matrix operation to solve the following linear equations. If there is no exact solution, please provide your reason. Also attach your MATLAB code. (20%) xi-3×2 + x,-1 x^-x^ +2r3 -4 x-2×2-3 2x, -x, -9 B. x1-2×2 + 2×3 = 1 11x, +2×2 +x3 12 3 x, + 4×2-2x,-1 5x, -8×2 + 2×3 5 C. 2×1 + 3×2-x3 = 1 D 14 7×1 + 3×2 + 4x,-7 5. Determine if the following matrices satisfy the
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