The Old Familiar and The Beehive are the only two bistros in town. Each one is trying to decide whether or not it should advertise in the local newspaper. The following payoff matrix gives their weekly profits under each possible outcome: 

Here are four combinations of X and Y. 

a. Which of the combinations of X and Y would make The Old Familiar not advertising and The Beehive advertising a Nash equilibrium? 

b. Which of the combinations of X and Y would cause this game to have multiple Nash equilibria?

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The Old Familiar advertises The Old Familiar doesn't advertise The Beehive advertises The Old Familiar earns $X profit. The Beehive earns SY profit. The Old Familiar earns $2,000 profit. The Beehive doesn't advertise The Old Familiar earns $3,500 profit. The Beehive earns $2,250 profit. The Old Familiar earns $2,500 profit. The Beehive earns $4,000 profit. The Beehive earns $3,500 profit. Stevenson/Wolfers, Principles of Economics, 1e, 2020 Worth Publishers