Suppose the demand curve for a product is given by Q = 10 - 2P + Ps. Where P is the price of the product and Ps is the price of a substitute good. The price of a substitute good is $2.00.
(a) Suppose P = $1.00. What is the price elasticity of demand? What is the cross-price elasticity of demand?
(b) Suppose the price of the good, P, goes to $2.00. Now what is the price elasticity of demand? What is the cross-price elasticity of demand?