In a circle with centre O, AB is a chord such that ∠AOB=136∘. Use this information to answer the following.
(a) Point C lies on the minor arc AB. Calculate ∠ACB.
(b) Point D lies on the major arc AB. Find the reflex angle ∠ADB (the larger angle at D).
(c) Another chord PQ satisfies AB=PQ. Determine the measure of ∠POQ.