What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, z will sleep or z is not rich. For all z, z is rich if and only if z will climb a mountain.
For all z, if z were rich, then z is sleeping. For all z, if z were rich, then z is climbing a mountain. For all z, if z climbs a mountain, then z is rich.