Consider the following premises. There is at least one y for which y will make tea if and only if y will sleep. For all y, if y reads a book, then y is making tea. Can we infer the following from them? There is at least one y for which if y reads a book, then y is sleeping.
 From the fact that there is at least one y for which y will make tea if and only if y will sleep we can infer that there is at least one y for which if y makes tea, then y is sleeping. Finally, from the fact that for all y, if y reads a book, then y is making tea, and that there is at least one y for which if y makes tea, then y is sleeping we can infer that there is at least one y for which if y reads a book, then y is sleeping. Therefore, the answer is yes.