\textbf{182.} In the circuit shown, how many amperes is $I'$?
\textit{[Figure: Circuit with $6\,\Omega$, $3\,\Omega$, $2\,\Omega$ resistors in series, battery $\varepsilon = 36\,\text{V}$, internal resistance $r = 2\,\Omega$, and current $I'$ through the branch]}
\begin{itemize}
\item[(1)] zero
\item[(2)] $0.5$
\item[(3)] $2.5$
\item[(4)] $1.5$
\end{itemize}