OREALC/2006/PI/H/7
!" #
%$&
' '
"! #
! $%& ' " '
( *
)
( /
) .
( 1 #/
*
(
,
2
( (
, .
,
( (
+
( /
(
2 (
)
/ 1 *
*
(
) /
(
)
*
+
)
3 +/ (
. '
+ ( 3
) .
.
.
. 1
( (
+
,
) (
/ ,
.
+ 0 (
/ (
(
/* ( 4
( *
,
( +
(
1 ,
0
1 ( .
,
.. . . 1
)
( +
( (
)
/ (
/
(
5 (
2
( (
/ (
&
#(
+
+
1 (
(
,
(
*
( -
(
+ (
6 ( (
+
(
' )
(* (
,
. ( ( + *
15
7/ ,
(
(
)
/ 8 75
/ +
.
(
+
, -
+
)
. 8 79
*
, ( 8
.
/
,
(
,
0
(
( 3
1 ) :
+
*
( (
+ ( 1
. ) .
(
( . (
+ 5
,
(
( (
+ 7; , -
,
) +
) ,
/
(
+ +/ (
(
. ,
+
* / .
,
+
) ,
. (
'
1 8 (
(
1
(
,
( )
.
(
( * +
-2
/ + 3
) ( 3
/ &
( .
(
. (
( (
(
* 3 .
+ . (
,
( *
1# ( ( ) + , (
( ( )
/ (
+
(
(
+
/ (
, )(
+
.
*
(
+
( ( (
1 . . ) ) ( ( ) 3 ( .
1 (
) .
) ) *( ( +
.
( (
(
3
,
.
1 75 , (
, ( , (
-
8 7# , ) ( 1
, ) 8 '* 3 4 +
/ )
.
.
(
*
17
( ,
.
/
2 1
,
(
.
(
* ,
( )
(
(
4
4
. 8
.
( ,
.
4
)
, +
)
+
. +
1 . )
,
)
/
( (
(
+ 2
, ( . 1
(
.
*
)
+ + ( (
.
(
2
$ 2 2
(
6
) ( / ) (
( ( (
?
1
+ ,
2 ) * (
/ *
(
/
. + ( . 1
. *
)
(
(
+ . (
+ (
3).
7, /
.
)
, .
+ /
( +
.
(
>
( 1 5
, 1
. 2
: ( +
)( (
,
+ . + ( 3
,
@
.
(
1 ) (
/
/
( (
( (
+
( (
+
2 1
( .
* ,
. (
( .
(
)
/
(
-
(
(
(
* 1 /
3
(
,
@ +
(
,
. ( )
+ (
3 ( )2 ( (
( ( ( )
(
. @ + (0 @ 3
(
,
(
+
1
. (
/ -
( .
: + (
3
(
* )(
(
0
.
(
.
) (
+
(
, ( . +
( + *
)
@ .
(
,
@
(
/ (
)
, )
( .
+
@
(
( ) 1
. 4
+
2
.
(
)
/
5 ( )
) 1
)
(
:
(
(
,
3 -(
@ ( 3
3
+
- ( 3 0 ( ) * +
1
( (
* (
, *
(
,
.
+
(
. (
(
. 1' * ( ) / ( ( + ) ( 3 , 3 ( +
* 1
+
*
4 / + , / + * ( , (
( , .
1 *
1
/
4
3
(
*1
,
( ( (
( (
)2 ( ( ( /
,
) .
(
(
( 1 (
+
( 3
/
+
( 4
.
(
( (
( ( ( + (
( (
1 3 .
1
3
( +
. +
. + + . 2 ( 3 . .
3 *
( + * . , (
, (
+
/ ) + .
2)
.
1
, 5
+
3
.
(
( .
+
( *
3
.
(
)
1
:
.
-(
(
2
/
( )
.
) + ,
( * (
)
)( (
( (
,
2
+ / ( 4 ( / . * , . 4 . 1 ( ) *
,
(
,
(
(
*
,
. ) + +
3 0
* (
* (
, ) (
( .
,
1
( * ( ( ) (
/ )
( ( (
,
(
)(
( +
( . ) , + -( ,
)
*
) ( +
4 ) +
) *
>
, 1
,
2
.
4
(
+
+ (
( ( - + ( ,
(
,
+
3
,
(
(
(
, 3
( C = AAD? (
+
+
@ 3 AE ? + -
(
(
,
(
( 3
.
. @ ( ) +
(
2)
+
.
( 3
+
/
3
(
,
) +
3 )
.*
( +
( (
) @
( ( 3 + ( ( +
(
(
. ) , )
*
( . (
( (
*
+
+
1 ( 2
-
*
( %
( (
2
( (
. / (
) *
(
(
( )(
+
1
.
+ . (
,
(
,
+ ,
/ +
1
( -
)
,
,
.
.
. ,
)
(
,
2
,
.
( ,
(
@
2 3
(
@ +
. )
,
.
( *
) + , (
(
(
1
. ( . ) (
1
,
(
(
+ (
( (
( (
)
( , 3 : .
(
0 / (
+
.
,
=! .
6
, )
,
2
( . ,
(
= AAB? . ,
,
.
.
.. 1
+
( * (
. (
3 , & +
. 1 (
, ( 3
1 )
+ ,
) (
.
+
4
3 .
3
. ( ) + ( +
,
) ( -
( ( 1
. (
.
+
) )
,
3
+ 3 ( . 1
(
+
(
(
.
( . +
.
(
+ , (
* + , /
( +
/
+
/
( + , ,
( ( (
/ , ) +
(
+
)
4 1
.
(
)
+
)
1
( (
(
,
,
+ .
) +
)
(
)
( 4
) (
. +
*
(
3
+
( 4
+
) 1 ) 2
,
. *
)
,
.
3 + (
+
(
.
3
. (
4 3
(
/ ( 4
,
* (
(
3 1
.
(
( *
)
(
.
:
1
!
6
)
)
(
+
#
3 3
, (
, )
(
3 0,
. (
.
+
(
(
!
.
3
.
+ 4 . / (
( 1
( ( + ( 3
,
-
)
D1 1 6 /F
. . (
(
(
81
#
' 2
C1 = AAI?
+ +
(
1 F + 1
(
H1 = AEA?1
1 #
4
+
(< K1 = AAB? # / G 4
/
"
!1 + M + P & GQ
1 6/ ! ;
% )
1 #
:
#1
.
3
