????:1???????????:????????

2?????vx

3???????

4????????????

5???????????

2?????????????????????????????????16???????,???????,????,????????????????????????????????????(?)??????? ??????? ? 2?????????????????????????????????16????,??,???????,????????(?????)????????????????????????????????? ? ????? 2?16??????????,???,?,???????? ? ? 2?16????????,??????,?????????????????????????????????,?????????????? ???? ? 2????16??,??,?,???????????????????????? ????? ????? ??:?????