Discuss the below:
Q1: Let n be a given positive integer, and let r and s be nonnegative integers such that r + s = n and s is even. Show that there exists a graph G of order n having r even vertices and s odd vertices.
Q2: Figure below shows two regular nonisomorphic graphs of order 6 and size 9. Give another example of two nonisomorphic regular graphs of the same order and same size.
