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, if x_5 drinks water, then x_5 is listening to a song. There is at least one x_5 for which x_5 will read a book. For all x_5, x_5 is a bartender. For all x_5, if x_5 were a bartender, then x_5 is drinking water.
For all x_5, x_5 will drink water can be inferred via the universal modus ponens rule. For all x_5, if x_5 were a bartender, then x_5 is listening to a song can be inferred via the universal transitivity rule. There is at least one x_5 for which x_5 will read a book and x_5 is a bartender can be inferred via the existential conjunction rule. Some bartenders will read a book can be inferred via the existential conjunction rule.