What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z_1, z_1 is a server. For all z_1, z_1 will play a game. For all z_1, if z_1 plays a game, then z_1 is a cashier. For all z_1, if z_1 were a cashier, then z_1 is taking a plane.
For all z_1, z_1 is a cashier. For all z_1, if z_1 plays a game, then z_1 is taking a plane. For all z_1, z_1 is a server and z_1 will play a game. For all z_1, z_1 will play a game and z_1 is a server.