/ ___________\ / ___________\ / ___________\ / ___________\ | / ___ | | / ___ | | / ___ | | / ___ | | / 5 \/ 5 | | / 5 \/ 5 | | / 5 \/ 5 | | / 5 \/ 5 | | ___ I* / - + ----- | | ___ I* / - + ----- | | ___ I* / - - ----- | | ___ I* / - - ----- | | 1 \/ 5 \/ 8 8 | | 1 \/ 5 \/ 8 8 | | 1 \/ 5 \/ 8 8 | | 1 \/ 5 \/ 8 8 | (x - 1/3)*|x + -- - ----- + ------------------|*|x + -- - ----- - ------------------|*|x + -- + ----- + ------------------|*|x + -- + ----- - ------------------| \ 12 12 3 / \ 12 12 3 / \ 12 12 3 / \ 12 12 3 /