What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, if y reads a book, then y is driving a car. There is at least one y for which y is fast if and only if y will drive a car. For all y, y is not fast.
There is at least one y for which if y were fast, then y is driving a car. There is at least one y for which if y drives a car, then y is fast. There is at least one y for which y will not drive a car.