4. A competitive market is described by the following 5-0 model: 0|) Demand: P = 10 Q Supply: P = Q What is the free market equilibrium P and Q? Suppose a $1 per unit tax is placed on this good. What is the new equilibrium quantity (it can be a non-integer), the new price that buyers will pay, and the new price that sellers will receive? Suppose instead that a $1 per unit subsidy is placed on this good. Now, what is the new equilibrium quantity (it can be a non-integer), the new price that buyers will pay, and the new price that sellers will receive? Graph the situations in part (b) and (c) indicating the cost or revenue for the government in these situations