What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one z for which if z were excited, then z is sad. For all z, if z were a janitor, then z is excited. For all z, if z were sad, then z is a janitor.
For all z, if z were sad, then z is excited. There is at least one z for which if z were excited, then z is a janitor. There is at least one z for which if z were a janitor, then z is sad.