y       x2     x3     x4
8.223   6.108  5.960  2.013 
11.799  2.838  3.245  7.650 
8.529   2.399  1.691  6.420 
11.339  3.408  3.363  8.915 
14.241  7.500  7.201  1.284 
22.859  9.487  9.691  5.021 
23.079  7.491  7.451  9.755 
13.942  2.904  2.969  5.022 
10.240  2.543  2.488  0.144 
8.881   4.072  4.225  4.647 
5.017   0.937  0.912  7.844 
26.534  6.682  6.691  9.240 
9.230   5.403  5.534  2.045 
13.332  4.446  4.540  6.129 
18.787  3.601  3.826  7.455 
16.797  8.356  8.243  3.551 
24.586  9.473  9.392  0.466 
14.744  0.982  0.658  8.213 
15.318  2.395  2.517  8.821 
14.361  2.541  2.522  3.636 
19.706  2.359  2.482  9.482 
25.549  4.831  5.363  9.671 
4.612   2.277  1.970  1.664 
12.359  1.820  1.794  8.157 
23.192  8.691  8.435  6.539 
6.876   2.865  3.009  3.733 
7.546   0.222  0.567  2.564 
4.826   4.235  4.022  0.416 
15.889  4.658  4.695  1.319 
5.800   0.093  0.370  6.871 
3.481   1.302  1.503  3.814 
13.305  3.322  3.281  4.456 
10.027  0.676  0.782  7.129 
15.452  2.827  2.848  5.206 
24.359  9.546  9.482  6.427