Can a tutor please double check the following answers:

Question 6. Consider the following single-play version of a Prisoner's Dilemma game

Player 2 T D T 4. 4 1, 5 Player 1 D 5, 1 2, 2Player 2 T D T An, An 2n - 1, 2n + 3 Player 1 D 2n + 3, 2n - 1 2n, 2nFitness 4n F(T) 2n + 3 4 F(D) - 2n 2n - 1 O (n - 3/2)/(n- 1) x = proportion of defectors (D-types)