D and E are points on the sides AB and AC, respectively, of ΔABC such that DE is parallel to BC and AD ∶ DB = 7 ∶ 9. If CD and BE intersect each other at F. then find the ratio of areas of ΔDEF and ΔCBF.

1
49 ∶ 144
2
49 ∶ 81
3
49 ∶ 256  
4
256 ∶ 49

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