In the “Play or Pass” game, Dan must first decide whether to choose “Play” or “Pass” (node A). If Dan calls “Play,” he earns a payoff of 1 and Patrick loses 10. If Dan decides to opt for “Pass,” Patrick will choose “Play” at node B, yielding Dan a payoff of zero and Patrick a payoff of 12. Therefore, at the Nash equilibrium, Dan will choose “Play” and earn 1.