Q22: A simple graph has no loops. What other property must a simple graph have? Select one:

a. It must be directed.

b. It must have at least one vertex.

c. It must be undirected.

d. It must have no multiple edges.

Q23:Which of the following statements is TRUE for undirected graphs? P: Number of odd degree vertices is even. Q: Sum of degrees of all vertices is even. Select one:

a. P only

b. Q only

c. Neither P nor Q

d. Both P and Q