What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_2, if y_2 were rich, then y_2 is a nurse. There is at least one y_2 for which if y_2 were a musician, then y_2 is rich. For all y_2, if y_2 were a sailor, then y_2 is a musician. For all y_2, if y_2 were a nurse, then y_2 is a sailor.
For all y_2, if y_2 were rich, then y_2 is a sailor. For all y_2, if y_2 were a nurse, then y_2 is a musician. There is at least one y_2 for which if y_2 were a musician, then y_2 is a nurse. There is at least one y_2 for which if y_2 were a sailor, then y_2 is rich.