Question and Answer: 1-3 Answers

Answer 1:

An example of one correct answer is the graphic below, which also serves as the graphic for Question 2.

Answer 2:

Node 5 is the dangling node.

Answer 3:

Yes, it is possible for a graph to have more than one dangling node. In the graph below, consider making the link from webpage 4 to webpage 5 inactive.  Then webpages 4 and 5 are dangling nodes.