12
| - | - - |
.
(, , -
..) .
.
:
a) (*) , -
;
b) (*) , -
, ;
c) (*) , -
;
d)
( -
);
e) ,
;
f)
.
:
( ..., , , , , , , )
: ..., , , .
, :
( ..., , , , )
( .., )
( , )
( , )
Access:
__:
| () | ||
| (PK) | ||
| _ (PK) | ||
| (PK) | ||
| _ | ||
| _ (PK) | / |
:
| () | ||
| (PK) | ||
| _ |
:
| () | ||
| (PK) | ||
| _ |
_:
| () | ||
| (PK) | ||
| _ |
:
(a) , ;
|
|
|
R1= 
R2= 
(
(b) , -
, ;
(
(c) , ;
R1= 
(
