What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, if x_9 were happy, then x_9 is sad. There is at least one x_9 for which if x_9 drives a car, then x_9 is happy. For all x_9, x_9 will drive a car if and only if x_9 will cook.
There is at least one x_9 for which if x_9 drives a car, then x_9 is sad. For all x_9, if x_9 drives a car, then x_9 is cooking. For all x_9, if x_9 cooks, then x_9 is driving a car.