3;
        </li>
        <li>
          <a href = "p04_data.png">p04_data.png</a>,
          a plot of the data and piecewise linear interpolant for problem p04;
        </li>
        <li>
          <a href = "p04_poly.png">p04_poly.png</a>,
          a plot of the polynomial interpolant for problem p04;
        </li>
        <li>
          <a href = "p05_data.png">p05_data.png</a>,
          a plot of the data and piecewise linear interpolant for problem p05;
        </li>
        <li>
          <a href = 