5. [I mark] Are the following graphs isomorphic? Justify your answer. u1 u2 01 02 06 ug Discrete math 6. (2 marks] The complement of a simple undirected graph G, denoted G, has the same vertices as G where two vertices in G are adjacent if and only if they are not adjacent in G. (a) Describe the graph K (b) If G is a simple graph with 13 edges and G has 8 edges, how many vertices does G have