8.Sketch an undirected graph with the following vertex degrees 3,2,1,1 if it exists

12.Sketch an undirected graph with the following vertex degrees 3,3,3,3 if it exists

4.Sketch an undirected graph with the following vertex degrees 3,3,3,2,1 if it exists

5.Sketch an undirected graph with the following vertex degrees 3,3,2,2 if it exists.

6.Sketch an undirected graph with the following vertex degrees 4,3,3,2,2 if it exists