What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, if z reads a book, then z is playing tennis. For all z, z is sad. There is at least one z for which z will read a book.
There is at least one z for which z will play tennis. There is at least one z for which z will read a book and z is sad. There is at least one z for which z is sad and z will read a book.