1. Two games, X and Y, can be simultaneously played at a casino, where each game results in either $1.00 won, lost, or neither. Their probabilities, including xed row and column marginal probabilities, are shown in the tabulated joint probability mass function below, for some parameters (2,13, and y. (a) What condition(s) on ant}, and y must hold if this is indeed a legitimate joint pmf? (5 pts)