21-1

x1

1/1

21-2

x1

1/1

21-3

x1

1/1

21-4

x1

1/1

21-5

x1

1/1

21-6

x1

1/1

21-7

x1

1/1

21-8

x1

1/1

21-9

x1

1/1

21-10

x1

1/1