Suppose that the demand and supply functions for good x are given as follows: Of = 120 - 2P, + 1 + P. and Of --30+ P -21+5-2f where P. denotes the price of good x. P, denotes the price of a related product y, I denotes income, t denotes tax firms face, s denotes subsidy and f denotes factor prices. What happens to the demand and supply of good x as Income falls? Demand shifts to the left while supply stays the same. O Demand shifts to the right while supply stays the same. O Both supply and demand shift to the left. No change in Demand and Supply