Consider the following premises. There is at least one x_9 for which if x_9 were a bartender, then x_9 is a cashier. For all x_9, if x_9 drinks water, then x_9 is a cashier. For all x_9, x_9 will play tennis. For all x_9, x_9 is a bartender or x_9 will drink water. Can we infer the following from them? There is at least one x_9 for which x_9 will play tennis.
 From the fact that there is at least one x_9 for which if x_9 were a bartender, then x_9 is a cashier, that for all x_9, if x_9 drinks water, then x_9 is a cashier, and that for all x_9, x_9 is a bartender or x_9 will drink water we can infer that there is at least one x_9 for which x_9 is a cashier. From the fact that there is at least one x_9 for which x_9 is a cashier, and that for all x_9, x_9 will play tennis we can infer that some cashiers will play tennis. Finally, from the fact that some cashiers will play tennis we can infer that there is at least one x_9 for which x_9 will play tennis. Therefore, the answer is yes.