22 In the diagram, the points A, B, C and D lie on the circle centre O. TA and TB are tangents touching the circle at A and B respectively. AOBˆ = 132°, ACDˆ = 59° and AOC is a straight line. (a) Find ATBˆ. (b) Find BDAˆ. (c) Find BDCˆ. (d) Find OBDˆ.