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_3, if x_3 were an electrician, then x_3 is a bartender. For all x_3, x_3 is an electrician. For all x_3, x_3 will sleep.
For all x_3, x_3 is a bartender can be inferred via the universal modus ponens rule. For all x_3, x_3 is an electrician and x_3 will sleep can be inferred via the universal conjunction rule. For all x_3, x_3 will sleep and x_3 is an electrician can be inferred via the universal conjunction rule.