. 4- ..
--- 1 ---
400
2
100 -
2 - 3 .
--- 2 ---
200 ( ),
1 ( 350 )
1
70 ( )
--- 3 ---
250
3
150
1 -
--- 4 ---
300 , ..
200
,
https://www.youtube.com/playlist?list=PLeXna8d-Lvd2QPDkKkkfl4A2HkSW5FGCC
!!!