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Graph proofs

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I need following questions in Page number 23 & 24 ( Please see the attachment)

Page 23

Exercise Problem 1.16

Page 24

Exercise Problem 1.20, 1.21, 1.22 & 1.25.

Prove that a graph....

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This provides examples of several types of graph proofs.

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Hello

Please find the solution in the attached file.

1.16.
Given that u and v are any arbitrary vertices of the given graph. Then by definition of the u-v WALK , u-v walk is an alternating sequence of the vertices and edges , which start from one vertex and end with another vertex. If we start from one vertex and graph is connected therefore walk passes from each edges whatever edges or ...

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