1.4.43 Matrix transformations

condition: Find the Jordan form of the matrix \(A\). \[ A=\left[\begin{array}{cccc} 4 & 1 & 1 & 1 \\ -1 & 2 & -1 & -1 \\ 6 & 1 & -1 & 1 \\ -6 & -1 & 4 & 2 \end{array}\right] \]