What kind of graph (from table 1) can be used to model a highway system between

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What kind of graph (from table 1) can be used to model a highway system between major cities where: a) there is an edge between the vertices representing cities if there is an interstate highway between them? b) there is an edge between the vertices representing cities for each interstate highway between them? c) There is an edge between the vertices representing cities for each interstate highway between them, and there is a loop at the vertex representing a city if there is an interstate highway that circles this city? Type Edges Multiple Edges Allowed? Loops allowed? Simple graph Undirected No No Multi graph Undirected Yes No Pseudograph Undirected Yes No Simple directed graph Directed No No Directed multigraph Directed Yes Yes Mixed Graph Directed and Undirected Yes Yes

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Table?

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