Two straight lines AB and BC intersect at a point B of chainage 1100m…

Question

Two straight lines AB and BC intersect at a point B of chainage 1100m. To avoid an obstacle another line PQ is taken to connect AB and BC, so that angle APQ= $140^{\circ}$ and angle PQC =$155^{\circ}$. The radius of first arc is 400 m and that of second is 300 m .calculate changes of tangent points and point of compound curvature.