it is the question from graph theory

10. (CLZ, Chapter 12, Q17(a)]) Let G be a graph in which every vertex has odd degree. Let {V1, V2} be a partition of V(G). Denote by (V1, V2] the set of edges of G joining V and V2. Prove that Vil and |[V1, V2] have the same parity. 10. (CLZ, Chapter 12, Q17(a)]) Let G be a graph in which every vertex has odd degree. Let {V1, V2} be a partition of V(G). Denote by (V1, V2] the set of edges of G joining V and V2. Prove that Vil and |[V1, V2] have the same parity