Select all correct answers

Select every of the following statements which is true. O For every extensive form game G, every subgame perfect equilibrium of G is also a Nash equilibrium of G. For every extensive form game G, every subgame perfect equilibrium of G is a Nash equilibrium of G that is also a Nash equilibrium of every subgame of G. O Every finite extensive form game of perfect information has at least one subgame perfect equilibrium in pure strategies. O For every extensive form game G, every Nash equilibrium of G is also a subgame perfect equilibrium of G