3.


2.1. ......................................................................................................................................... 17

2.2. ................................................................................................................................................................... 20

2.3. .............................................................................................................................. 23

2.4. ................................................................................................................................................... 25

3. .......................................................................................................... 28

3.1. ...................................................................................................................................... 28

3.2. ............................................................................................................................................. 30

3.3. .............................................................................................................................................................. 33

3.4. .................................................................................................................................................................... 37

3.5. .................................................................................................................................................... 39

4. .................................................................................. 45

4.1. ............................................................................................................................................. 45