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_4 for which z_4 will not make tea. For all z_4, if z_4 were poor, then z_4 is making tea. For all z_4, if z_4 were a cashier, then z_4 is poor. For all z_4, if z_4 were poor, then z_4 is a cashier.
There is at least one z_4 for which z_4 is not poor. For all z_4, if z_4 were a cashier, then z_4 is making tea. For all z_4, z_4 is a cashier if and only if z_4 is poor. For all z_4, z_4 is poor if and only if z_4 is a cashier.