1. $A=\left(\begin{array}{cc}-1& -3\\ 2& 4\end{array}\right)$

• A. $\frac{1}{2}\left(\begin{array}{cc}4& 3\\ -2& -1\end{array}\right)$
• B. $\frac{1}{2}\left(\begin{array}{cc}4& 3\\ -2& -1\end{array}\right)$
• C. $\frac{1}{2}\left(\begin{array}{cc}4& 3\\ -2& -1\end{array}\right)$
• D. $\frac{1}{2}\left(\begin{array}{cc}4& 3\\ -2& -1\end{array}\right)$

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