What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_2, if x_2 works, then x_2 is a janitor. For all x_2, if x_2 were a janitor, then x_2 is cooking. For all x_2, if x_2 cooks, then x_2 is working.
For all x_2, if x_2 works, then x_2 is cooking. For all x_2, if x_2 were a janitor, then x_2 is working. For all x_2, if x_2 cooks, then x_2 is a janitor.