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_10, if x_10 makes tea, then x_10 is driving a car. For all x_10, x_10 will make tea. There is at least one x_10 for which if x_10 writes a letter, then x_10 is driving a car.
For all x_10, x_10 will drive a car can be inferred via the universal modus ponens rule.