Use the following to answer questions: 
-(Table: Street Cleanings) Look at the table Street Cleanings. Increasing the number of street cleanings per month from _____ would yield a marginal social benefit (for Peter and Wendy together) equal to $12.
Definitions:
Genetic Variation
Differences in the DNA sequence among individuals, which contribute to the uniqueness of each person's physical and behavioral characteristics.
Intelligence Test
A standardised assessment used to measure a person's intellectual capabilities and potential.
Heredity
The passing on of physical or mental traits genetically from one generation to another.
Intelligence Test
A psychological tool designed to measure a person's cognitive capabilities, specifically their mental capacity for learning, reasoning, and problem solving.
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