Consider the following premises. forall x: U(x) -> Q_3(x). forall x: U(x). Can we infer Q_3(g) from them? If possible, name the inference rules being used at each step.
 From forall x: U(x) -> Q_3(x), forall x: U(x) we can infer forall x: Q_3(x) via universal modus ponens. Finally, from forall x: Q_3(x) we can infer Q_3(g) via universal instantiation. Therefore, the answer is yes.