Consider an undirected random graph of eight vertices. The probability that there is an edge between a pair of vertices is 1/2. What is the expected number of unordered cycles of length three?

•  (A) 1/8
•  (B) 1
•  (C) 7
•  (D) 8

Which of the following statements is/are TRUE for undirected graphs?
                     P: Number of odd degree vertices is even.
                     Q: Sum of degrees of all vertices is even.

•  (A) P only
•  (B) Q only
•  (C) Both P and Q
•  (D) Neither P nor Q