As previously indicated, we are accepting strategies entered in one of two ways. Option A permits the use of "responsive" strategies, for which you pick a play for round one, then pick a response for round two, based on your and your opponents' plays in round one, and then identify sixteen responses for each of the possible combinations of length-two histories for the remaining rounds. Option B permits the use of a set series of plays, for each of the twenty-five rounds you will play against each strategy. Remember that only decimals on the interval [0,1] will be accepted, and please limit your entries to two decimal places at most. 0 indicates a "Defect" play, 1 indicates "Cooperate," and a decimal between 0 and 1 represents a probability of selecting Cooperate. In the form below, history notation is as follows: (Opponent's previous move, Opponent's penultimate move), (Own previous move, Own penultimate move). Please ensure that you enter all information accurately, as we would prefer to have only one submission from each student.