\[\boxed{\text{6.37.}}\]
\[\textbf{а)}\ N\ (1,5)\ лежит\ правее\ \]
\[\text{M\ }(1,3)\text{.\ }\]
\[\textbf{б)}\ P\ (0,55)\ лежит\ правее\ \]
\[\text{K\ }(0,51).\]
\[\textbf{в)}\ \ Z\ (5,55)\ лежит\ правее\]
\[\ \text{L\ }(5,5).\]