Consider the following premises. For all x_6, x_6 will drive a car or x_6 is a janitor. For all x_6, if x_6 drives a car, then x_6 is writing a letter. For all x_6, x_6 will not write a letter. Can we infer the following from them? For all z_2, z_2 is a janitor.
We cannot infer that from the premises. Therefore the answer is no.