What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_7: P_7(x_7). exists x_7: U(x_7). forall x_7: Q_7(x_7).
forall x_7: P_7(x_7) and Q_7(x_7). forall x_7: Q_7(x_7) and P_7(x_7). exists x_7: U(x_7) and P_7(x_7). exists x_7: U(x_7) and Q_7(x_7). exists x_7: P_7(x_7) and U(x_7). exists x_7: Q_7(x_7) and U(x_7).