What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_11, x_11 is a writer if and only if x_11 will play tennis. For all x_11, x_11 will play tennis and x_11 is excited.
For all x_11, x_11 will play tennis. For all x_11, x_11 is excited. For all x_11, if x_11 were a writer, then x_11 is playing tennis. For all x_11, if x_11 plays tennis, then x_11 is a writer.