What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_5, if x_5 drives a car, then x_5 is a mechanic. There is at least one x_5 for which if x_5 plays squash, then x_5 is driving a car. For all x_5, if x_5 were a mechanic, then x_5 is driving a car. For all x_5, x_5 is a mechanic or x_5 will play squash.
There is at least one x_5 for which if x_5 plays squash, then x_5 is a mechanic. There is at least one x_5 for which x_5 will drive a car. For all x_5, x_5 will drive a car if and only if x_5 is a mechanic. For all x_5, x_5 is a mechanic if and only if x_5 will drive a car.