Find the mixed equilibrium strategies in the following zero-sum game, where x is any positive number. (Note, the payoff shown in the table is the payoff for the Row player) (10 pts) R1 R2 C1 3x R1 R2 R3 X 3) Determine the mixed equilibrium strategy of the following two-person zero-sum game. (Note, the payoff shown in the table is the payoff for the Row player) (10 pts) C1 C2 -20 20 0 C2 2x 3x 20 0 -20 C3 0 -20 20 4) Find the winner of the election, when the social choice function is STV. (5 pts) A B D 2 voters B AD A C 2 voters CDBA 1 voter