2. [6] A thin, uniformly charged wire of total length 5D lies along the
x-axis as shown. One end of the wire is at x = -2D and the other end
is at x = +3D. The total charge on the rod is $Q_0$. Find $E_x$, the electric
field component in the x-direction, at the point (0, a).
\begin{itemize}
\item Answer in terms of the given parameters: a, D, Q, numbers and
constants. Remove x, y, z, r, $\theta$, $\lambda$, $\eta$ or other terms you might
need to introduce along the way.
\item Show your work carefully, as well as the integral (with limits)
you create. Label your diagram.
\end{itemize}
