?:??????
??�??????80??�
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
???? ?????????????
???? ?????????????
??
????:
1???????80??:??????
2??????????
3????????
4??????
5???????????
?:??????
????
6
%
???:??