Need some help on price elasticity. Any help would be appreciated. Let the demand function be Q(d) = 200 – 2P(X). a.What is the own price elasticity

Need some help on price elasticity. Any help would be appreciated.

Let the demand function be Q(d) = 200 – 2P(X).

a.      What is the own price elasticity of demand when P = 10?

b.      What is the own price elasticity of demand when P = 20?

c.      Find the inverse demand function and graph the demand curve.