what is the nash equilibrium

4. Consider the decisions of 2 competing firms who are choosing which of 2 possible new products to introduce. Each firm's profit depends on what product they choose and the product that the other firm chooses Firm A has the ability to be a first mover and then Firm B views the decision made by Firm A before making a decision (i.e. it is a sequential game). The decision tree and relevant payoffs are shown below. Firm A's payo is listed first followed by Firm B's payoff. Product 1 20, 20 Firm B Product 1 Product 2 30, (40 Firm A Product 2 50, 40 Product 1 Firm B Product 2 25, 25 a) What is the subgame-perfect Nash equilibrium outcome of this game? b) In this game, is it better for a firm to be a first-mover or a second-mover