What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, if z were an astronaut, then z is cooking. For all z, z is an astronaut. For all z, z is happy.
For all z, z will cook. For all z, z is an astronaut and z is happy. For all z, z is happy and z is an astronaut.