     0         1    |
|         |         |                                                 |
|  p_3    |  q_07   |    0.        0         1         1         1    |
|         |         |                                                 |
|  p_4    |  q_09   |    0.        1         0         0         1    |
|         |         |                                                 |
|  p_5    |  q_27   |    1.        1         0         1         1    |
|         |         |                                     