Step-by-step explanation:
1. BF bisects ∠CBA. Given
2. ∠CBF ≅ ∠ABF. Definition of angle bisector
3. BF ≅ BF. Reflexive property
4. ∠CFB ≅ ∠AFB. Given
5. ΔCBF ≅ ∆ABF. ASA congruence postulate
6. CF ≅ FA. Corresponding parts of congruent triangles are congruent (CPCTC)
_____
Comment on the problem
It appears as though all of the congruence symbols have gone missing.