The following table shows possible matches between some objects a, b, c, d, e on the left, and some objects v, w, x, y, z on the right. Each object on the left can be matched with any one of the objects on the right. Is there a complete matching from the objects on the left to the objects on the right? Prove that there is or is not. Prove that K_4 is bipartite, or that it is not bipartite. For which values of n is C_n bipartite? Briefly explain your