\[\boxed{\text{5.262.}}\]
\[\text{MN}\ от\ \text{AB} \rightarrow \frac{5}{9}\ часть;\ \]
\[\text{XY}\ от\ \text{AB} \rightarrow \ \frac{8}{9}\ часть;\ \]
\[\text{CO}\ от\ \text{AB} \rightarrow \frac{7}{9}\ часть;\ \]
\[\text{RN}\ от\ \text{AB} \rightarrow \frac{11}{9} = 1\frac{2}{9}\ часть;\ \]
\[\text{ZK}\ от\ \text{AB} \rightarrow \frac{9}{9} = 1\ часть.\ \ \]