Math Help - What are the eigenvalues and eigenvectors of the following matrix?

1. What are the eigenvalues and eigenvectors of the following matrix?

$\begin{pmatrix} \frac{5}{200} & \frac{-5}{200} \\ \frac{-5}{200} & \frac{5}{200} \end{pmatrix}$

2. What ideas have you had so far?