Consider the following premises. q. forall x_9: P_9(x_9). Can we infer P_9(a_9) and q from them? If possible, name the inference rules being used at each step.
 From forall x_9: P_9(x_9) we can infer P_9(a_9) via universal instantiation. Finally, from P_9(a_9), q we can infer P_9(a_9) and q via conjunction. Therefore, the answer is yes.