Find a matrix \(\mathbf{A}\) whose eigenvalues are \(-1,1,2\) and for which corresponding eigenvectors are
\(\left(\begin{array}{l} 1 \\ 0 \\ \end{array}\right), \quad\left(\begin{array}{l} 1 \\ 1 \\ \end{array}\right), \quad\left(\begin{array}{l} 0 \\ 1 \\ \end{array}\right),\)
respectively.