What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_10, x_10 will play tennis or x_10 is a janitor. For all x_10, if x_10 drives a car, then x_10 is rich. For all x_10, x_10 will drive a car. There is at least one x_10 for which if x_10 were a janitor, then x_10 is a writer. For all x_10, if x_10 plays tennis, then x_10 is a writer.
For all x_10, x_10 is rich. There is at least one x_10 for which x_10 is a writer.