/ ______________ \ / ______________ \ / ______________ \ | / ______ / ___\ | | / ______ / ___\ | | / ______ | | / 7 \/ 4737 | 1 I*\/ 3 | 4 | | / 7 \/ 4737 | 1 I*\/ 3 | 4 | | / 7 \/ 4737 4 | |x + - 3 / - + -------- *|- - - -------| + -------------------------------------|*|x + - 3 / - + -------- *|- - + -------| + -------------------------------------|*|x + - 3 / - + -------- + ---------------------| | \/ 2 18 \ 2 2 / ______________| | \/ 2 18 \ 2 2 / ______________| | \/ 2 18 ______________| | / ___\ / ______ | | / ___\ / ______ | | / ______ | | | 1 I*\/ 3 | / 7 \/ 4737 | | | 1 I*\/ 3 | / 7 \/ 4737 | | / 7 \/ 4737 | | 3*|- - - -------|*3 / - + -------- | | 3*|- - + -------|*3 / - + -------- | | 3*3 / - + -------- | \ \ 2 2 / \/ 2 18 / \ \ 2 2 / \/ 2 18 / \ \/ 2 18 /