Use the following to answer question: 
-(Table: Marginal Benefit from Additional Streetlights) Use Table: Marginal Benefit from Additional Streetlights.Suppose that the marginal cost of installing a streetlight is $6.What is the socially optimal number of streetlights in the neighborhood?
Definitions:
Net Income
Net income is the total profit of a company after all expenses, taxes, and costs have been subtracted from total revenue.
Operating Income
The profit realized from a business's core operations, excluding deductions of interest and taxes.
Market-Based Income
Income generated from investments in the financial markets, such as stocks, bonds, or other assets.
Cash Flow From Investments
Financial statement item that reports the net amount of money used for or generated from the company's investment purchases and sales during a specific period.
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