An economy has two people, Adam and Betty. There are two goods, good x and good y. Adam has an initial endowment of 12 units of x and 12 units of y. Betty has an initial endowment of 24 units of x and 6 units of y. Adam's utility function is U (a, ya) = Caya, where x is his good x consumption and ya is his good y consumption. Betty's utility function is U (x6, yb) = by, where a, and y are her good x and good y consumption, respectively. At every Pareto optimal allocation, (a) Adam consumes more good y per good x than Betty does. (b) Betty consumes equal numbers of good x and good y. (c) Adam consumes the same number of good x as Betty. (d) Adam consumes 18 units of x for every 9 units of y that he consumes. (e) Betty consumes 12 units of x for every 3 units of y that she consumes