x1 <- c(0.8, 0.5, -0.5, 0.1, 1.2, -0.8, -0.5, -2.3, -0.5, 0.4, -1.1,
-0.1, -1.2, -0.7, -0.2, 0.9, -1.7, -0.9, 0.2, 0.7, -0.6, -1.2, -1.5,
0.3, -1.4, 1.3, -0.7, 0.8, -2.3, -1.7, 1.4, -2.2, 0.5, 0.8, 0.8, -1.1,
-0.4, 0, 1.6, 1.4, 1.2, -0.4, 0.4, -0.2, -0.3, -0.2, 0.8, -1, 2.2, -1.2,
-0.9, -1.3, 1.4, -0.9, 0.9, 0.1, -0.8, 1.1, -0.6, 0.8, -0.1, 0.3, 0.4,
2.3, -0.3, 1.3, 0.5, -0.7, -0.8, 1.3, 0.2, 0.9, -0.4, 0, 0.5, -2.5, 0.1,
0.3, 1.4, 0.7, 0.9, 0, -0.6, 2, -0.2, 1, -1, -0.4, 0.4, -0.4, -0.9,
-0.1, 0.6, -1.6, 0.7, 1.7, -1.8, -0.6, -1.7, 1.3)

x2 <- c(-0.2, -0.7, 1, 0.5, 1.7, 1.1, -1.4, -2.3, 1.3, -1.1, -0.3, 0,
-0.3, 1, 0.3, -1.6, -2.5, -0.4, -0.2, -0.3, 0.4, -0.9, 0.1, -0.4, -1.4,
-0.5, -2.9, 0.7, -0.7, 1.2, 1.2, -0.5, -0.3, 0.8, -0.5, -0.6, 1.8, 0.3,
1.2, -0.1, 0.7, 1.1, -0.8, -1.2, 0.5, 1.4, -0.9, 0.6, -1.1, 0.3, -0.3,
-1, -0.1, -1.6, 1.9, -0.6, -0.4, 0.6, -0.7, -0.5, -1.9, 0.1, 0, 1.7,
-0.9, -1.1, 0.7, 0.1, -0.9, 0, -0.1, 0.6, 1.3, 0.5, 0.1, 0.8, -0.4, 0.6,
1.9, -0.1, 1.8, -0.5, -0.3, 0.9, 0.4, -0.7, -0.2, 0.8, -0.6, 0.8, -0.6,
0.1, -0.7, -2.4, -0.4, 1.3, -0.6, 1.1, 1.6, -1.2)

x3 <- c(0.5, -1.6, -1.2, -1.3, 2, 0.6, 0.5, -1.2, 0, -0.6, -1.1, 0.2,
0.5, 0, 0.5, -1.3, -0.1, -0.9, 0.9, -1.4, -1, -2.1, -0.6, 2, -0.1, 2, 0,
1.7, -1.8, -0.7, 0, 0.8, -0.9, -0.6, 0.2, 0.5, 0.1, 0.1, -0.1, 0.5, 1.2,
0.1, 1.3, 1.2, -0.1, 0.5, 0.8, 1.6, 1.2, 1, 1.8, 0, 0.7, 1.3, -1.8, 1.1,
1.2, 0.5, 0.7, -0.3, -0.9, 0.8, -1, -1.1, -0.1, 0.7, -0.4, -0.8, -1.4,
1.8, -1.1, 0.5, 0.6, -1, -0.5, 0.2, -1.5, 1.4, -1, 0.3, 0, -0.2, -1.3,
-1, 0.2, -0.6, 0.4, -1.1, 1.7, 0.4, 0.8, -0.6, -0.7, -0.7, 0.3, -0.4, 0,
-0.2, 0.8, -1.1)

x4 <- c(2.1, -1.4, -4.1, -3.5, 4.2, 0.5, 2.3, -0.8, -2.7, -0.7, -4.2,
0.4, -0.9, -0.8, -0.2, -0.5, 0.5, -1.8, 2, -3, -2.2, -5.1, -5.3, 5.5,
0.2, 6.5, 2.5, 1.8, -3.3, -3.4, 0, -1, -0.1, -0.5, 2.6, 0.2, -0.8, -1.1,
-1, 2.1, 1.7, -1.7, 2.9, 2, -1, -1.4, 3.1, 1, 4.4, 0.5, 3.5, -1, 2.2,
3.7, -5.1, 3.5, 1.5, 1, 2.1, 0, 0.4, 2.2, -1.6, 0, 0.3, 4.3, -3.3, -1.4,
-4.5, 5, -2, 1, -0.2, -2, -0.6, -1.6, -3.6, 2.3, -1.3, 1.6, 0.4, 0.3,
-4.4, -1.1, 0.2, 0.6, 1.6, -3, 3.8, -1.6, 1.8, -0.4, -1, -1.2, 2.2, 1,
-1.4, -2.3, -2.6, 1.3)

y <- c(4.05, -5.82, -7.92, -7.19, 22.23, 9.55, 7.93, -4.57, -4.9, -4.36,
-8.96, 6.96, 2.4, 2.45, 4.72, -1.08, 1.59, -6.98, 10.11, -7.82, -7.53,
-15.89, -13.92, 19.1, 1.2, 17.45, 5.35, 7.85, -11.29, -2.59, 1.96, 0.81,
-0.98, 2.17, 7.09, 0.14, 5.52, 0, -0.11, 8.15, 9.91, -0.72, 6.48, 7.96,
1.46, -0.73, 6.49, 9.74, 13.48, 6.45, 17.01, -0.13, 7.63, 16.04, -15.72,
11.35, 5.83, 5.68, 13.65, -2.11, -1.44, 3.7, -8.27, 0.9, 0.52, 13.4,
-7.08, -3.01, -18.38, 16.91, -5.21, 6.68, 4.97, -6.03, 0.25, 2.36,
-6.52, 10.34, -0.31, 8.38, 8.75, -0.66, -13.31, -2.57, 1.39, 1.64, 4.74,
-7.08, 14.71, -3.67, 6, 4.77, -5.03, -7.3, 5.1, 8.09, -2.96, 1.47, 1.29,
1.41)