Starting with the market demand and supply functions in Problem 1, determine algebraically the new equilibrium price and quantity if (a) the demand function changes to QD' = 12,000 - 1,000P or to QD" = 8,000 - 1,000P (b) the market supply function changes to QS* = -4,000 + 1,000P or to QS** = 1,000P.