\[\boxed{\text{5.287.}}\]
\[\textbf{а)}\ \text{O\ }(0);\ F\ \left( \frac{3}{5} \right);\ C\ \left( \frac{4}{5} \right);\ E\ (1);\ \]
\[\text{A\ }\left( 1\frac{4}{5} \right);\ P\ (2);\ \]
\[\text{R\ }\left( 2\frac{4}{5} \right);\ N\ (3);\ K\ \left( 3\frac{4}{5} \right)\text{.\ }\]
\[\textbf{б)}\ O\ и\ E \rightarrow 1\ ед.отр;\ \]
\[O\ и\ P \rightarrow 2\ ед.отр;\ \]
\[O\ и\ C \rightarrow \frac{4}{5}\ ед.\ отр;\ \]
\[F\ и\ C \rightarrow \frac{4}{5} - \frac{3}{5} = \frac{1}{5}\ ед.отр;\ \]
\[A\ и\ E \rightarrow 1\frac{4}{5} - 1 = \frac{4}{5}\ ед.\ отр;\ \]
\[R\ и\ E \rightarrow 2\frac{4}{5} - 1 = 1\frac{4}{5}\ ед.\ отр.\ \]
\[\textbf{в)}\ \text{C\ }\left( \frac{4}{5} \right) > F\ \left( \frac{3}{5} \right);\ \ \ \]
\[\text{C\ }\left( \frac{4}{5} \right) < E\ (1);\ \ \ \]
\[\text{R\ }\left( 2\frac{4}{5} \right) > P\ (2);\ \ \ \]
\[\text{N\ }(3) > A\left( 1\frac{4}{5} \right);\ \ \ \]
\[A\left( 1\frac{4}{5} \right) < K\left( 3\frac{4}{5} \right)\text{.\ \ }\]