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 play squash if and only if z is poor. For all z, if z cooks, then z is poor. For all z, z will not play squash. For all z, if z listens to a song, then z is cooking. For all z, if z were poor, then z is listening to a song.
For all z, if z cooks, then z is listening to a song. For all z, if z listens to a song, then z is poor. For all z, if z were poor, then z is cooking. For all z, if z plays squash, then z is poor. For all z, if z were poor, then z is playing squash. For all z, z is not poor.