Consider the following premises. For all x_3, x_3 is a janitor and x_3 will play tennis. Can we infer the following from them? For all x_3, x_3 is a janitor or x_3 is a mechanic.
 From the fact that for all x_3, x_3 is a janitor and x_3 will play tennis we can infer that for all x_3, x_3 is a janitor. Finally, from the fact that for all x_3, x_3 is a janitor we can infer that for all x_3, x_3 is a janitor or x_3 is a mechanic. Therefore, the answer is yes.