27-1

x1

1/1

27-2

x1

1/1

27-3

x1

1/1

27-4

x1

1/1

27-5

x1

1/1

27-6

x1

1/1

27-7

x1

1/1

27-8

x1

1/1

27-9

x1

1/1

27-10

x1

1/1

28-1

x1

1/1

28-2

x1

1/1

28-3

x1

1/1

28-4

x1

1/1

28-5

x1

1/1

28-6

x1

1/1

28-7

x1

1/1

28-8

x1

1/1

28-9

x1

1/1

28-10

x1

1/1