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, x_5 will write a letter or x_5 will not play tennis. For all x_5, if x_5 writes a letter, then x_5 is listening to a song. For all x_5, if x_5 listens to a song, then x_5 is playing tennis.
For all x_5, if x_5 writes a letter, then x_5 is playing tennis. For all x_5, if x_5 plays tennis, then x_5 is writing a letter.