What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall z_1: W_3(z_1) <-> U_2(z_1). exists z_1: U_2(z_1) -> W_3(z_1). forall z_1: U(z_1) <-> U_2(z_1).
forall z_1: W_3(z_1) -> U_2(z_1). forall z_1: U(z_1) -> U_2(z_1). forall z_1: U_2(z_1) -> W_3(z_1). forall z_1: U_2(z_1) -> U(z_1).