Given a demand function=(), the own price elasticity of demand is defined as

=()(/)

What is the own price elasticity of demand

(a) for the linear demand function=1005 when=10

(b) for the linear inverse demand function=1004when (i)=10; (ii)=20; (iii)=12.50

(c) for the demand function=^0.5, when (i)=10; (ii)=20

(d) for the inverse demand function=^1, when (i)=10; (ii)=20