Initial, we offer ?????????? ???? ????????????????? ???????? offers ??????????? ??? ?????? ?????????????? ??????? ha an effect on ?????????? ?????? ???? ????????????? ???????? ?? ???????? . ??????????? ??? ?????????? ??????? ???????????? ???? ????????? ??????????? ????? ???????? Second ?????? involve ????????????? ????? ??? ?? ???? ? ??? ?????