What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will play tennis if and only if x_9 will read a book. For all x_9, if x_9 were rich, then x_9 is reading a book. For all x_9, x_9 is not rich. For all x_9, if x_9 reads a book, then x_9 is rich.
For all x_9, x_9 will not read a book. For all x_9, x_9 is rich if and only if x_9 will read a book. For all x_9, x_9 will read a book if and only if x_9 is rich. For all x_9, if x_9 plays tennis, then x_9 is reading a book. For all x_9, if x_9 reads a book, then x_9 is playing tennis.