This funciton simulates a sequence of rounds of a game played between two selected agents.
sample_round(agents, foc_agent, opp_agent, pay, rounds = 100)A list of agents, two of which will play the game
The index of the first agent that will play the game
The index of the second agent that will play the game
A vector of the payoffs for CC (payoffs[1]), CD (payoffs[2]), DC (payoffs[3]) and DD (payoffs[4]) combinations of play choices from the focal player and the opponent
The number of rounds that the agents will play the game
round_hist The history of the game played between both agents