\documentclass[a4paper,12pt]{article}
\usepackage{epsfig}
\begin{document}
\parindent=0pt

\begin{center}
\textbf{Partial Differentiation}

\textit{\textbf{Functions of more than one variable}}
\end{center}

\textbf{Question}

\begin{center}
\epsfig{file=PD-1Q-1.eps, width=70mm}
\end{center}

\begin{description}
\item{(a)}
Is the landscape steepest at point P or R?

How can you tell?

\item{(b)}
Describe the topography of the region around Q.

\end{description}


\textbf{Answer}

\begin{description}
\item{(a)}
The landscape is steepest at $R$. This is because at this point, the
level curves are closer together.

\item{(b)}
Q is a ``pass'' between the two peaks to the east and to the west. The
land is level at Q, but rises as you move east/west and falls as you
move north/south.

\end{description}

\end{document}