!
1
!
(
4
4 4 )
!
)
(
)
(
(
)
EX)
(1)
EX)
(2)
(
)
(
)
(3)
!→!
(4)
(
)!
!
(5)
!
B
A
:
A
B A
(
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EX)
(1)
(
(2)
(i)
→
(ii)
→
(3)
)
(13 )
(
(13 )
:
)
(
(
(1)
)
!
!
(15 )
!
(2)
(18 1 )
(3)
(4)
)
(
)
!
!
4 4.
(
)
30
.
.
.
.
.
1.!
2.
3.
!!!!4.
5.