\rbqquest{At the indicated point of the graph of $Q(t)$, what sort of
  transaction am I  making?
}
\TODO
\hbcom{Can't get the figure to work inside the question environment.}
\begin{figure}[h]
\begin{verbatim}
             Q
                |
                |   __
                |  /  \          /
                | /    \        /
           _____|/______\______/______________   t
                |        \    /<---- here
                          \__/
\end{verbatim}
\end{figure}


\rbqchoice{
\begin{enumerate}[a)]
\item deposits

\item withdrawals
\end{enumerate}
}

\rbqans{(a), deposits. When the slope is positive $Q$ is increasing; i.e. I am making deposits.}
