this is problem of choice strategy and choice 13-11

13.11 Consider a yes-no voting system with five voters named A, B. C, D, and E. The voters A, B, C, and D are assigned the weights 4,3,2, and 1, respectively. To pass, a measure must reach a quota of q = 6 from voters A, B. C. and D and must also have E's support (E has veto power). Decide whether or not this is a weighted voting system. Prove your answer. 12 17