What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_4, y_4 will climb a mountain if and only if y_4 will drive a car. For all y_4, y_4 will not drive a car. There is at least one y_4 for which y_4 will work if and only if y_4 will cook. For all y_4, y_4 will climb a mountain if and only if y_4 will work.
For all y_4, if y_4 climbs a mountain, then y_4 is driving a car. For all y_4, if y_4 climbs a mountain, then y_4 is working. There is at least one y_4 for which if y_4 works, then y_4 is cooking. For all y_4, if y_4 drives a car, then y_4 is climbing a mountain. For all y_4, if y_4 works, then y_4 is climbing a mountain. There is at least one y_4 for which if y_4 cooks, then y_4 is working. For all y_4, y_4 will not climb a mountain.