Consider the following premises. q and s_4. forall z: W(z) -> Q_2(z). W(c) or u. u -> Q_2(c). Can we infer q and Q_2(c) from them? If possible, name the inference rules being used at each step.
 From forall z: W(z) -> Q_2(z) we can infer W(c) -> Q_2(c) via universal instantiation. From q and s_4 we can infer q via simplification. From W(c) -> Q_2(c), u -> Q_2(c), W(c) or u we can infer Q_2(c) via disjunction elimination. Finally, from q, Q_2(c) we can infer q and Q_2(c) via conjunction. Therefore, the answer is yes.