61. As shown in the figure, in quadrilateral $A B C D$, $A D / / B C$, point $E$ is on $A D$, points $F, G$ are on $B C$, and $A E=E D=B F=F G=G C$. Among the triangles formed by any three of the 7 points $A, B, C, D, E, F, G$, the number of triangles with the smallest area is $\qquad$; the number of triangles with the largest area is $\qquad$.
answer: 17,3