\[\boxed{\text{П.26.}}\]
\[\textbf{а)}\ \text{M\ }(5)\text{.\ }\]
\[\textbf{б)}\ \text{M\ }(1,5)\text{.\ \ }\]
\[\textbf{в)}\ \text{M\ }(4,9)\text{.\ }\]
\[\textbf{г)}\ \text{M\ }(9,95)\text{.\ \ \ }\]
\[\textbf{д)}\ \text{M\ }\left( \frac{6}{7} \right)\text{.\ \ }\]
\[\textbf{е)}\ \text{M\ }(1,1)\text{.\ \ \ \ \ }\]