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 were happy, then z is reading a book. For all z, if z reads a book, then z is a carpenter. For all z, if z were a carpenter, then z is happy.
For all z, if z were happy, then z is a carpenter. For all z, if z reads a book, then z is happy. For all z, if z were a carpenter, then z is reading a book.