Suppose you wish to reduce a negative externality by imposing a tax on the activity that creates that externality. On a supply-demand diagram, please show the tax needed to correct the externality if the amount of externality produced rises as output rises. Assume that the marginal private cost curve slopes upward.

Negative Externalities: The Market for Electricity in the Midwest C $0.14 Marginal social cost Dollars per kilowatt-hour 0.10 Marginal private cost D 0 35 50 Millions of kilowatt- hours of electricity per month