The smaller eigenvalue is
\(\lambda_1 = -15\) with associated unit eigenvector
\(\vec{u}_1 = \begin{bmatrix}
-0.8944 \\
-0.4472
\end{bmatrix}\).
The larger eigenvalue is
\(\lambda_2 = 25\) with associated unit eigenvector
\(\vec{u}_2 = \begin{bmatrix}
-0.4472 \\
0.8944
\end{bmatrix}\).
Thus, the final answers are:
\[
\boxed{\lambda_1 = -15, \quad \vec{u}_1 = \begin{bmatrix}
-0.8944 \\
-0.4472
\end{bmatrix}, \quad \lambda_2 = 25, \quad \vec{u}_2 = \begin{bmatrix}
-0.4472 \\
0.8944
\end{bmatrix}}
\]