What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, if y were a soldier, then y is a writer. For all y, if y listens to a song, then y is a soldier. For all y, if y were a writer, then y is listening to a song. There is at least one y for which y will listen to a song if and only if y is a soldier.
For all y, if y were a soldier, then y is listening to a song. For all y, if y listens to a song, then y is a writer. For all y, if y were a writer, then y is a soldier. There is at least one y for which if y listens to a song, then y is a soldier. There is at least one y for which if y were a soldier, then y is listening to a song.