What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x_7: P_7(x_7) -> R(x_7). forall x_7: P_1(x_7) -> Q_1(x_7). exists x_7: P_7(x_7). forall x_7: P_1(x_7).
forall x_7: Q_1(x_7) can be inferred via the universal modus ponens rule. exists x_7: R(x_7) can be inferred via the existential modus ponens rule. exists x_7: P_7(x_7) and P_1(x_7) can be inferred via the existential conjunction rule. exists x_7: P_1(x_7) and P_7(x_7) can be inferred via the existential conjunction rule.