What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_1, if x_1 makes tea, then x_1 is not playing tennis. For all x_1, x_1 will play a game if and only if x_1 will make tea. For all x_1, x_1 will play tennis.
For all x_1, x_1 will not make tea. For all x_1, if x_1 plays a game, then x_1 is making tea. For all x_1, if x_1 makes tea, then x_1 is playing a game.