??????????????÷??? ????????????????

????????????1??????????????????С?????????????????!?л????????????

?????????????????????????????????????????????????????????

?????????0~5???1??1??????? 6~10 ???1??2??????? 11~15 ???1??3???????;

?????????0~5???2??1???????(2?????????) 6~10 ???2??2??????? 11~15 ???2??3???????;(????о??????????)

???6 10 15 ?????????……?????6~9??????????6 ?????????10~14 ????????10

??????????????? ??1????????

???????……

????????……

????????????????+11(?????11?????????)??????????????????????????+10.???????+15…(?????????……)

??????????50%~80%???????……