Consider the following premises. For all x_11, x_11 will make tea if and only if x_11 will work. For all x_11, x_11 is poor if and only if x_11 will play tennis. For all x_11, if x_11 plays tennis, then x_11 is making tea. Can we infer the following from them? For all x_11, if x_11 were poor, then x_11 is working.
 From the fact that for all x_11, x_11 will make tea if and only if x_11 will work we can infer that for all x_11, if x_11 makes tea, then x_11 is working. From the fact that for all x_11, if x_11 plays tennis, then x_11 is making tea, and that for all x_11, if x_11 makes tea, then x_11 is working we can infer that for all x_11, if x_11 plays tennis, then x_11 is working. From the fact that for all x_11, x_11 is poor if and only if x_11 will play tennis we can infer that for all x_11, if x_11 were poor, then x_11 is playing tennis. Finally, from the fact that for all x_11, if x_11 were poor, then x_11 is playing tennis, and that for all x_11, if x_11 plays tennis, then x_11 is working we can infer that for all x_11, if x_11 were poor, then x_11 is working. Therefore, the answer is yes.