Consider the following premises. For all x_5, if x_5 were happy, then x_5 is making tea. For all x_5, if x_5 makes tea, then x_5 is playing squash. For all x_5, if x_5 makes tea, then x_5 is happy. Can we infer the following from them? For all x_5, if x_5 were happy, then x_5 is playing squash.
 From the fact that for all x_5, if x_5 makes tea, then x_5 is happy, and that for all x_5, if x_5 were happy, then x_5 is making tea we can infer that for all x_5, x_5 will make tea if and only if x_5 is happy. From the fact that for all x_5, x_5 will make tea if and only if x_5 is happy we can infer that for all x_5, if x_5 were happy, then x_5 is making tea. Finally, from the fact that for all x_5, if x_5 were happy, then x_5 is making tea, and that for all x_5, if x_5 makes tea, then x_5 is playing squash we can infer that for all x_5, if x_5 were happy, then x_5 is playing squash. Therefore, the answer is yes.