X1

X2

X3

X4

X5

X6

X7

X1

0

0

0

0

−(−1 + β)X5

0

0

X2

0

0

2X3

X4

0

0

0

X3

0

−2X3

0

0

0

0

0

X4

0

−X4

0

0

0

0

0

X5

−(−1 + β)X5

0

0

0

0

0

−X5

X6

0

0

0

0

0

0

−X6

X7

0

0

0

0

X5

X6

0