l derivatives should be
    vectors. Try doing this problem without looking at the steps
    below, but instead try to follow the patterns in the previous
    problems.

    <ol>
      <li>Rewrite the parametric equations for $s$
      and $t$ in vector form.</li>

      <li>Compute $D\vec F(s,t)$ and the derivative of your vector
      function from the previous part, and then
      multiply them together to find the derivative of $\vec F$
      with respect to $p$ and $q$. How many columns should we
     