      sets default values for problem 03.
        </li>
        <li>
          <a href = "p03_exact.m">p03_exact.m</a>, 
          sets the exact integral for problem 03.
        </li>
        <li>
          <a href = "p03_f.m">p03_f.m</a>, 
          evaluates the integrand for problem 03.
        </li>
        <li>
          <a href = "p03_i4.m">p03_i4.m</a>, 
          sets or gets I4 parameters for problem 03.
        </li>
        <li>
          <a href = "p03_lim.m">p03_lim.m</a>, 
          returns t