Module 75 Featured Worksheet Public Policy and Externalities A firm's production creates waste that pollutes a nearby river. 1. Use a correctly labeled demand and supply graph to show each of the following: a. Demand, supply, and market equilibrium price and quantity, labeled Pe and Qe. b. marginal private cost, marginal private benefit c. Marginal social cost and marginal social benefit d. The efficient level of output, labeled Qo e. The size of the tax that would cause the firm to internalize the external cost and produce the efficient level of output.A firm sells fire alarms that create a positive externality for the neighbors of people who purchase them. 2. Use a correctly labeled demand and supply graph to show each of the following; a. Demand, supply, and market equilibrium price and quantity, labeled Pe and Qc. b. marginal private cost, marginal private benefit c. Marginal social cost and marginal social benefit d. The efficient level of output, labeled Qo e. The size of the tax that would cause the firm to internalize the external cost and produce the efficient level of output