Question 2
Let $A_1,A_2,A_3,A_4,A_5,A_6$ be six points on a circle in this order, with arc lengths $\widehat{A_1A_2}=\widehat{A_2A_3}$, $\widehat{A_3A_4}=\widehat{A_4A_5}$, and $\widehat{A_5A_6}=\widehat{A_6A_1}$. Here each hat denotes the length of the corresponding consecutive arc. Given $\angle A_1A_3A_5=72^\circ$, find $\angle A_4A_6A_2$ in degrees.