1. a. Brinley's demand function is linear and can be characterized by the function: 2x = a+ bP, + cP, + dI . Ryker is Brinley's brother and his demand function can be derived by multiplying Brinley's function by a positive constant as follows: R. =k . Q = ka + kbP, + kcP, + kdl How are Brinley's and Ryker's own-price elasticities of demand different? b. The cross-price elasticity of x with respect to Py is different at every point along a linear demand curve. Does this mean that x and y are gross substitutes in one region of the demand curve and gross complements in another region? Use Brinley's linear demand function in part 1(a) above to prove your