What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z_2, if z_2 reads a book, then z_2 is playing tennis. For all z_2, if z_2 plays tennis, then z_2 is a server. For all z_2, if z_2 were a server, then z_2 is playing tennis. For all z_2, z_2 is a server or z_2 will read a book.
For all z_2, if z_2 reads a book, then z_2 is a server. For all z_2, z_2 will play tennis. For all z_2, z_2 will play tennis if and only if z_2 is a server. For all z_2, z_2 is a server if and only if z_2 will play tennis.