When all firms have a dominant strategy and each firm chooses its dominant strategy, then it is a state of:

Given below are two statements: Assertion (A): The 'Tit-for-Tat' strategy in repeated game theory is associated with Robert Axelrod. Reason (R): Axelrod demonstrated through computer tournaments that Tit-for-Tat — cooperate first, then mirror the opponent's last move — achieves the highest average score in iterated Prisoner's Dilemma games. Choose the correct answer:

Consider the following equilibria: (i) Stackelberg equilibrium (ii) Monopoly equilibrium Which of these fits into the concept of Nash equilibrium?