Consider the following premises. For all x_9, x_9 will drink water and x_9 is a server. For all x_5, if x_5 drinks water, then x_5 is sleeping. Can we infer the following from them? Jennifer is sleeping.
 From the fact that for all x_9, x_9 will drink water and x_9 is a server we can infer that for all x_9, x_9 will drink water. From the fact that for all x_9, x_9 will drink water we can infer that Jennifer is drinking water. From the fact that for all x_5, if x_5 drinks water, then x_5 is sleeping we can infer that if Jennifer drinks water, then Jennifer is sleeping. Finally, from the fact that if Jennifer drinks water, then Jennifer is sleeping, and that Jennifer is drinking water we can infer that Jennifer is sleeping. Therefore, the answer is yes.