<

<


ต<

C 1
C 1
C 2
C 2
C 2
C 3
C 3
C 3
C   3

<

<

pd

A

1

A

1

A

2

A

2

A

2

A

2

A

3

A

3

A

3

A

3

P

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N
C 2 6 2 2
C 2 1 5 2
C 3 1 5 2
C 4 1 1 2
C 4 3 2 3