, . , , IS LM. IS LM , , , , , .
IS (, 1 I . 2.12) : , , .
, IS ( 2 II . 2.12), , ( ), , .
.2.12
, LM (3 III , 2.12), / , . , , .
, LM (4 III . 2.13), / . , , , .
: , , , , .
: ( ) , , . , , , LM ( . 2.13)
.2.13
(. . 2.14). , (YA) , .
. 2.14
, , , , , , . , ( ). , , . , , . . , .