Consider the following premises. There is at least one x_4 for which x_4 is a server or x_4 will make tea. For all x_4, x_4 is not a server. For all x_4, x_4 is sad. Can we infer the following from them? There is at least one x_4 for which x_4 will make tea and x_4 is sad.
 From the fact that there is at least one x_4 for which x_4 is a server or x_4 will make tea, and that for all x_4, x_4 is not a server we can infer that there is at least one x_4 for which x_4 will make tea. Finally, from the fact that there is at least one x_4 for which x_4 will make tea, and that for all x_4, x_4 is sad we can infer that there is at least one x_4 for which x_4 will make tea and x_4 is sad. Therefore, the answer is yes.