\begin{exerciseStatement}
Find the largest interval for which the Existence and Uniqueness Theorem for Linear IVPs guarantees a unique solution for the following IVP.
\[ -{\left(t + 4\right)} {\left(t - 1\right)} {y'} - e^{\left(3 \, t\right)} = {\left(t - 6\right)} {y} e^{t} \hspace{2em}
x( -3 )= -8 \]
\end{exerciseStatement}
\begin{exerciseAnswer}
\[(-4,1)\]
\end{exerciseAnswer}