Price Elasticity Questions:

4) (a) Suppose Ed=0.5 for a given good. If there's a 5% change in price, what is the change in quantity demanded (Qd)?

(b) Suppose once again that Ed=0.5, but there's now a 15% change in price (all else equal). Calculate the change in quantity demanded.

(c) Suppose that the price elasticity of demand (Ed) for a given good is 1.5. If the quantity demanded increases by 2%, what is the percentage change in price? Please show work...