(Solved): If the matrix of change of basis form the basis \( B \) to the basis \( B^{\prime} \) is \( A=\le ...

If the matrix of change of basis form the basis \( B \) to the basis \( B^{\prime} \) is \( A=\left(\begin{array}{ll}5 & 2 \\ 2 & 1\end{array}\right) \) then the first column of the matrix of change of basis from \( B^{\prime} \) to \( B \) is: A. \( \left(\begin{array}{l}2 \\ 1\end{array}\right) \) B. \( \left(\begin{array}{l}1 \\ 2\end{array}\right) \) C. \( \left(\begin{array}{c}1 \\ -2\end{array}\right) \) D. \( \left(\begin{array}{l}2 \\ 5\end{array}\right) \)