/ ____ ____\ / ____ ____\ / ____ ____\ / ____ ____\ | \/ 10 I*\/ 10 | | \/ 10 I*\/ 10 | | \/ 10 I*\/ 10 | | \/ 10 I*\/ 10 | |x + ------ + --------|*|x + ------ - --------|*|x + - ------ + --------|*|x + - ------ - --------| \ 2 2 / \ 2 2 / \ 2 2 / \ 2 2 /