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 plays tennis, then x_9 is climbing a mountain. There is at least one x_9 for which x_9 will drive a car if and only if x_9 is a mechanic. For all x_9, if x_9 climbs a mountain, then x_9 is a mechanic.
For all x_9, if x_9 plays tennis, then x_9 is a mechanic. There is at least one x_9 for which if x_9 drives a car, then x_9 is a mechanic. There is at least one x_9 for which if x_9 were a mechanic, then x_9 is driving a car.