Given a graph defined by the following vertex set and edge set, V={A,B,C,D,E,F}E={AB,BC,BE,BF,CD,DE,EF}? What is the degree of vertex A ? a. 1 b. 2 c. 3 d. 4 QUESTION 15 Given a graph defined by the following vertex set and edge set, VE?={A,B,C,D,E,F}={AB,BC,BE,BF,CD,DE,EF}? What is the degree of vertex D ? a. 1 b. 2 c. 3 d. 4