Consider the following premises. For all x_5, if x_5 reads a book, then x_5 is playing squash. For all x_5, if x_5 plays squash, then x_5 is reading a book. There is at least one x_5 for which x_5 will read a book. Can we infer the following from them? There is at least one x_5 for which x_5 will play squash.
 From the fact that for all x_5, if x_5 reads a book, then x_5 is playing squash, and that for all x_5, if x_5 plays squash, then x_5 is reading a book we can infer that for all x_5, x_5 will read a book if and only if x_5 will play squash. From the fact that for all x_5, x_5 will read a book if and only if x_5 will play squash we can infer that for all x_5, if x_5 reads a book, then x_5 is playing squash. Finally, from the fact that for all x_5, if x_5 reads a book, then x_5 is playing squash, and that there is at least one x_5 for which x_5 will read a book we can infer that there is at least one x_5 for which x_5 will play squash. Therefore, the answer is yes.