What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, if x_5 sleeps, then x_5 is playing a game. For all x_5, if x_5 listens to a song, then x_5 is writing a letter. For all x_5, x_5 will not play a game. For all x_5, if x_5 writes a letter, then x_5 is sleeping.
For all x_5, x_5 will not sleep. For all x_5, if x_5 listens to a song, then x_5 is sleeping. For all x_5, if x_5 writes a letter, then x_5 is playing a game.