22. In $\triangle A B C$, $D E, F G, M N, P Q, B C$ are mutually parallel, and $A D=D F=F M=M P=P B$, then $S_{\triangle A D E}: S_{D E G F}: S_{F G N M}: S_{M N Q P}: S_{P Q C B}=$ $\qquad$
Answer: $1: 3: 5: 7: 9$