Question: a. Solve the linear system (mathbf{A x}=mathbf{b}) by using Cramer's rule. b. (uparrow) Repeat (a) in MATLAB. (mathbf{A}=left[begin{array}{ccc}2 & frac{1}{2} & -1 1 &

a. Solve the linear system $\mathbf{A x}=\mathbf{b}$ by using Cramer's rule.

b. $\uparrow$ Repeat (a) in MATLAB.

$\mathbf{A}=\left[\begin{array}{ccc}2 & \frac{1}{2} & -1 \\ 1 & 1 & -2 \\ \frac{1}{2} & -1 & \frac{1}{2}\end{array}\right], \quad \mathbf{b}=\left\{\begin{array}{c}19 \\ 26 \\ -8\end{array}\right\}$

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