What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_5, x_5 will go running. For all x_5, if x_5 goes running, then x_5 is a cashier. For all x_5, x_5 is a sailor.
For all x_5, x_5 is a cashier can be inferred via the universal modus ponens rule. For all x_5, x_5 will go running and x_5 is a sailor can be inferred via the universal conjunction rule. For all x_5, x_5 is a sailor and x_5 will go running can be inferred via the universal conjunction rule.