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The eigen value of matrix \(A= \begin{bmatrix} 1 & 2\\ 0 & 2\\ \end{bmatrix}\)are written in the form \(\begin{bmatrix} 1\\ a\end{bmatrix}\)and \(\begin{bmatrix} 1\\ b \end{bmatrix}\) then, what will be the value of \(a\)  and  \(b\)?