Use the following to answer questions: 
-(Table: Marginal Benefit from Additional Streetlights) Look at the 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:
Financial Gains
Profits or monetary benefits received from investments, operations, or other financial activities.
Fresh Ideas
New and innovative thoughts or approaches to problems or challenges.
Collective Efficacy
The shared belief in the ability of a group to execute actions and achieve objectives effectively.
Team Performance
A measure of how effectively a team achieves its goals and objectives, often influenced by factors such as communication, coordination, and leadership.
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