he rules have the following orders (number of points) and 
      precisions (maximum degree of polynomials whose integrals they
      can compute exactly):
      <table border="1" align="center">
        <tr>
          <th>Rule</th><th>Order</th><th>Precision</th>
        </tr>
        <tr>
          <td>0</td><td>  1</td><td> 1</td>
        </tr>
        <tr>
          <td>1</td><td>  3</td><td> 2</td>
        </tr>
        <tr>
          <td>2</td><td>  4</td><td> 2</td>
        </tr>
        <tr>
       