︽ 9 | ︾ | ︽ 9 ︾ | ︽ | ︾ | | | | 20 | 26 2 3 | | | 3 | | | | 30% | | ︽ | | ︾ | ︽ ︾ | | 20% | | | | | | 15 20 | | |