Example 10.2.1
y1={21, 21, 20.5, 23.5, 21.5, 20, 21.5, 23, 20, 16.5, 24.5};
y2={20, 21.5, 24, 24.5, 23, 21, 22.5, 23, 21, 19, 25};
y3={21.5, 24, 24.5, 25, 22.5, 21, 23, 23.5, 22, 19, 28};
y4={23, 25.5, 26, 26.5, 23.5, 22.5, 25, 24, 21.5, 19.5, 28};
B={ 1 1 1
1,
-3
-1 1 3};
c={ 1 -1
-1 1,
-1
3 -3 1};