| | | | | | | | | | | | 20% | 8% | | | | | | 20% | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1 | 2 | | 3 | | 15 | | | | | | | | | | = | 1 + / | 2 1 % | = / | | 7 | | | / 139 | | | | | |