Diagonalization & Matrix Powers · Easy problem

$\begin{pmatrix}2 & 1\\0 & 2\end{pmatrix}$

$\begin{pmatrix}0 & 1\\0 & 0\end{pmatrix}$

$\begin{pmatrix}5 & 1 & 0\\0 & 5 & 0\\0 & 0 & 1\end{pmatrix}$

$\begin{pmatrix}1 & 2 & 3\\0 & 4 & 5\\0 & 0 & 6\end{pmatrix}$