Please explain the concept. Also, why answer for part d have to be met in the way it is presented? Thank you

3. In each of the following three payoff tables, two decision makers, Gates and Jobs, must make simultaneous decisions to either cooperate or not cooperate with each other. Explain, for each payoff table, why it does or does not represent a prisoners' dilemma situation for Gates and Jobs. a. Jobs Don't cooperate Cooperate Gates Don't cooperate $500, $600 $675, $450 Cooperate $350, $750 $572, $635 b. Jobs Don't cooperate Cooperate Gates Don't cooperate $700, $800 $675, $450 Cooperate $350, $750 $572, $635 Jobs Don't cooperate Cooperate Gates Don't cooperate $500, $600 $572, $450 Cooperate $350, $635 $675, $750 d. Choose any values for payoffs a - f so that Gates and Jobs face a prisoner's dilemma game in which the decision pair Don't cooperate, Don't cooperate is the dominant strategy equilibrium: Jobs Don't cooperate Cooperate Gates Don't cooperate a, d be Cooperate $100, $90