QUESTION 5 Suppose product X does not violate the Law of Demand. The demand function for product X is Q = 20 - 4A - 6B. Product Z is the complement of X, while product Y is the substitute of X. Which of the followings cannot be true? 1. A is the price of X, B is the income. II. A is the price of Z, B is the price of X. Ill. A is the income, B is the price of X. IV. A is the price of X. C is the price of Y. I only. O I and IV. O ll and Ill. 11, Ill, and IV. IV only K