Consider the following premises. There is at least one y_3 for which y_3 is bored. For all y_3, if y_3 were bored, then y_3 is making tea. For all y_3, y_3 will cook and y_3 will play squash. Can we infer the following from them? If we can, name the inference rule being used: There is at least one y_3 for which y_3 is bored.
That is one of the premises. Therefore, the answer is yes.