16 In the diagram, AP, BQ and CR are the bisectors of the angles of triangle ABC. The bisectors intersect at O. (a) OBPˆ = 31°, OCQˆ = 22° and OAQˆ = 37°. Calculate POCˆ. (b) In the diagram, shade the region containing the points which are • nearer to AB than AC and • nearer to CA than CB.