Consider the following premises. forall x_10: Q_10(x_10). forall x_10: Q_5(x_10). forall x_10: W_4(x_10). Can we infer W_4(b) from them? If possible, name the inference rules being used at each step.
 From forall x_10: W_4(x_10), forall x_10: Q_10(x_10) we can infer forall x_10: W_4(x_10) and Q_10(x_10) via universal conjunction. From forall x_10: W_4(x_10) and Q_10(x_10) we can infer forall x_10: W_4(x_10) via universal simplification. From forall x_10: W_4(x_10), forall x_10: Q_5(x_10) we can infer forall x_10: W_4(x_10) and Q_5(x_10) via universal conjunction. From forall x_10: W_4(x_10) and Q_5(x_10) we can infer forall x_10: W_4(x_10) via universal simplification. Finally, from forall x_10: W_4(x_10) we can infer W_4(b) via universal instantiation. Therefore, the answer is yes.