Chapter 15.2, Problem 27E

(a)

To determine

To Prove: Candidate A wins the pairwise comparison method election for the original given profile.

The voter profile is:

$\begin{array}{cc}\text{Number}\text{of}\text{voting}& \text{Ranking}\\ \text{6}& \text{a > x > y > z}\\ \text{5}& \text{z > y > x > a}\\ \text{4}& \text{z > y > a > x}\\ \text{3}& \text{x > a > y > z}\end{array}$

(b)

To determine

Change in the ranking of last three voters such that z wins