, .
( , ). , , . , , .
(). , . , . , =0,33. (= 0,34).
- (), - . , . . , , . , , . .
, , , , . > Me > Mo, , , < Me < Mo. , , ; > 0, < 0.
. .
' . . k- :
, 2- , . 3- 4- .
= 0. , . ,
=:, . As > 0, As < 0. , '. , As <0,25 , As 0,5 , As > 0,5 .
4- =:. , Ek = . , > 3, < 3.