Question 30Distinct points $A$ and $B$ are on a semicircle with diameter $MN$ and center $C.$ The point $P$ is on $CN$ and $\angle CAP=\angle CBP=10^\circ.$ If $\overset{\frown}{MA}=40^\circ,$ then $\overset{\frown}{BN}$ equals $10^\circ$$15^\circ$$20^\circ$$25^\circ$$30^\circ$
