What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 were a server, then x_6 is not playing tennis. For all x_6, x_6 will play tennis. For all x_6, x_6 is rich if and only if x_6 is a server.
For all x_6, x_6 is not a server. For all x_6, if x_6 were rich, then x_6 is a server. For all x_6, if x_6 were a server, then x_6 is rich.