Question: The demand function for kingston's product is given by
logQ = 2.01 -0.148LogP + 0.25Log Z
Q = the quantity demanded (in tons) of its product, P = the price ( in dollars per ton), and Z = the price(in dollars of a rival product
a. Calculate the price elastic of demand
b. Calculate the cross elasticity of demand between kingston's product and the rival product.