Question 4In the diagram below, the points $B$ and $E$ lie on $AF$ and $DF$ respectively, and $AE$ and $BD$ intersect at $C$. If $AB=AC$, $BD=BF$ and $EA=EF$, find $\angle BAC$. $30^\circ$$33^\circ$$36^\circ$$38^\circ$$40^\circ$
