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x1=10,x2=2 x1=12,x2=10 x1=12,x2=2 x1=2,x2=2
x1=10,x2=2 x1=12,x2=10 x1=12,x2=2 x1=2,x2=2
x1=10,x2=2 x1=12,x2=10 x1=12,x2=2 x1=2,x2=2
X1 X2 (Xl,X2) (Xl,X2,X3,X4)
x1=10,x2=2 x1=12,x2=10 x1=12,x2=2 x1:2,x2=2