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James, Carl, Mark, Antonio, Phillip, and Brad are friends at college. Carl, Antonio and
Phillip have calculus together. Brad, Carl, and Mark have the same English composition
class. Draw a graph with vertices representing students and edges representing the relation
"take a common class". How many components does the graph have? Identify a subgraph
that is a complete subgraph with three vertices.
Spend
To use money to pay for goods or services, or more broadly, to use resources or time for a particular purpose.
Reciprocity Norm
A social norm dictating that people should repay, in kind, what another person has provided or done for them, fostering mutual cooperation and social bonds.
Free Gift
An item or service given without charge to a customer as an incentive or as part of a promotional strategy.
Christmas Ornament
Decorative items, often intricate and festive, used to adorn Christmas trees during the holiday season.
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