x1 =

    10     8    13     9    11    14     6     4    12     7     5

y1 =

    8.0400    6.9500    7.5800    8.8100    8.3300    9.9600    7.2400    4.2600   10.8400    4.8200    5.6800

x2 =

    10     8    13     9    11    14     6     4    12     7     5

y2 =

    9.1400    8.1400    8.7400    8.7700    9.2600    8.1000    6.1300    3.1000    9.1300    7.2600    4.7400

x3 =

    10     8    13     9    11    14     6     4    12     7     5

y3 =

    7.4600    6.7700   12.7400    7.1100    7.8100    8.8400    6.0800    5.3900    8.1500    6.4200    5.7300

x4 =

     8     8     8     8     8     8     8     8     8     8    19

y4 =

    6.5800    5.7600    7.7100    8.8400    8.4700    7.0400    5.2500    5.5600    7.9100     6.8900   12.5000