1 ++----------------+-----------------+-----------------+-----------------+----------------*A
      +                 +                 +                 +                 +              ** +
      |                                                                                   ***   |
      |                                                                                ***      |
      |                                                                              **         |
      |                                                                           ***           |
      |                                                                         **              |
  0.8 ++                                                                     ***               ++
      |                                                                    **                   |
      |                                                                 ***                     |
      |                                                              ***                        |
      |                                                            **                           |
      |                                                         ***                             |
      |                                                       **                                |
  0.6 ++                                                   ***                                 ++
      |                                                  **                                     |
      |                                               ***                                       |
      |                                            ***                                          |
      |                                          **                                             |
      |                                       ***                                               |
      |                                     **                                                  |
  0.4 ++                                 ***                                                   ++
      |                                **                                                       |
      |                             ***                                                         |
      |                          ***                                                            |
      |                        **                                                               |
      |                     ***                                                                 |
      |                   **                                                                    |
  0.2 ++               ***                                                                     ++
      |              **                                                                         |
      |           ***                                                                           |
      |        ***                                                                              |
      |      **                                                                                 |
      |   ***                                                                                   |
      + **              +                 +                 +                 +                 +
    0 A*----------------+-----------------+-----------------+-----------------+----------------++
      1                1.2               1.4               1.6               1.8                2


    2 ++---------------------+---------------------+----------------------+--------------------*A
      +                      +                     +                      +                  ** +
      |                                                                                   ***   |
      |                                                                                ***      |
      |                                                                              **         |
      |                                                                           ***           |
      |                                                                        ***              |
      |                                                                      **                 |
      |                                                                   ***                   |
  1.5 ++                                                               ***                     ++
      |                                                              **                         |
      |                                                           ***                           |
      |                                                        ***                              |
      |                                                      **                                 |
      |                                                   ***                                   |
      |                                                ***                                      |
      |                                              **                                         |
    1 ++                                          *A*                                          ++
      |                                         **                                              |
      |                                      ***                                                |
      |                                    **                                                   |
      |                                 ***                                                     |
      |                               **                                                        |
      |                            ***                                                          |
      |                          **                                                             |
      |                       ***                                                               |
  0.5 ++                    **                                                                 ++
      |                  ***                                                                    |
      |                **                                                                       |
      |             ***                                                                         |
      |           **                                                                            |
      |        ***                                                                              |
      |      **                                                                                 |
      |   ***                                                                                   |
      + **                   +                     +                      +                     +
    0 A*---------------------+---------------------+----------------------+--------------------++
      1                     1.5                    2                     2.5                    3