Economics 5. The following equations describe the behaviour exhibited by buyers and sellers for a particular product in a specific country: QP = 200 - 0.4P-1 Qi = -40 + 0.8P Note that Q, denotes the quantity demanded, Of is the quantity supplied and P, is price. (a) At the market equilibrium, find the difference equation for price (P;). (4 marks) (b) Find the unique solution for P , the long run equilibrium price and quantity, given that Po=$250. (7 marks) (c) Discuss the movement and stability of equilibrium price in the long run. (4 marks)