Chapter 6.5, Problem 13P

In each of problem $1$ through $14$, find a fundamental matrix for the given system of equations. In each case, also find the fundamental matrix $e^{\text{At}}$.

$\text{x'}=\left(\begin{array}{ccc}1& 1& 1\\ 2& 1& -1\\ -8& -5& -3\end{array}\right)\text{x}$