In a three-player game, which of the following is not one of the player designations for a payoff matrix?

Moving Water Around The San Diablo dam has electricity generating turbines on a chute that connects lower and upper reservoirs. During the day, water is drained from the upper reservoir to the lower to produce electricity. But at night, electricity is used to pump the water back up to the upper reservoir. Since the water is just going back and forth, how can wealth be generated?

Ron weighs 150 pounds. A graph relating Ron's weight on the vertical axis to Nancy's consumption of ice cream on the horizontal axis would be

a. a horizontal line at weight = 150 b. a horizontal line at weight = 0 c. a positively sloped line with decreasing slope d. a vertical line at weight = 150 e. the origin