What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: R_3(y). forall y: R_4(y). exists y: P(y).
forall y: R_3(y) and R_4(y). forall y: R_4(y) and R_3(y). exists y: P(y) and R_3(y). exists y: P(y) and R_4(y). exists y: R_3(y) and P(y). exists y: R_4(y) and P(y).