$c_j$

−2

−1

−5

0

0

0

${\theta }_i$

$C_B$

$X_B$

b

$x_1$

$x_2$

$x_3$

$x_4$

$x_5$

$x_6$

−2

$x_1$

6

1

0

0

−1

0

−1

0

$x_5$

0

0

0

7

1

1

4

−1

$x_2$

2

0

1

−1

0

0

−1

${\sigma }_j$

0

0

−6

−2

0

−3