Suppose that the demand and supply functions for good x are given as follows: Of = 600 - 2P - I + P, and Of = P. - 21 + s - 2f where Py 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 is the equilibrium quantity of x as a function of exogenous variables Py , I, t. s and f? O eqb I+Py-4t+2s-4f Qx = 120 + 3 O eqb Py+1-4t-25-4f Qx = 200 + 3 O neqb = 200 + - Py-1-4t+25-41 3 O Q eqb = 120 + Py-I-4t+2s-4f x 3