Consider the following premises. For all x_6, x_6 will work. For all x_6, x_6 will drive a car. For all x_6, x_6 is sad or x_6 will not work. Can we infer the following from them? If we can, name the inference rule being used: For all x_6, x_6 is sad and x_6 will drive a car.
 From the fact that for all x_6, x_6 is sad or x_6 will not work we can infer that for all x_6, if x_6 works, then x_6 is sad via universal rewriting. From the fact that for all x_6, if x_6 works, then x_6 is sad, and that for all x_6, x_6 will work we can infer that for all x_6, x_6 is sad via universal modus ponens. Finally, from the fact that for all x_6, x_6 is sad, and that for all x_6, x_6 will drive a car we can infer that for all x_6, x_6 is sad and x_6 will drive a car via universal conjunction. Therefore, the answer is yes.