Despite the warning of several countries including the U.S., Russia started invading Ukraine on February 24 of 2022. From a game theory perspective, this can be simplified as a two-player game with Russia as one player, and the combination of Nato and US. as the other player. Russia has two strategies - to invade Ukraine or not to invade Ukraine. The other player has two strategies - to assist Ukraine with strong military confrontation with Russia or not to do so.

1. Is this game more similar to the sequential move of the prisoner's dilemma game or the chicken game? Explain your answer. (2 points)

2. Is there a first-mover advantage? Characterize the equilibrium, i.e., how will the players choose what strategies sequentially? (2 points)