What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, if x_3 plays tennis, then x_3 is sleeping. There is at least one x_3 for which if x_3 works, then x_3 is sleeping. For all x_3, if x_3 sleeps, then x_3 is working. For all x_3, if x_3 sleeps, then x_3 is playing tennis.
For all x_3, if x_3 plays tennis, then x_3 is working. There is at least one x_3 for which if x_3 works, then x_3 is playing tennis. For all x_3, x_3 will play tennis if and only if x_3 will sleep. For all x_3, x_3 will sleep if and only if x_3 will play tennis. There is at least one x_3 for which x_3 will work if and only if x_3 will sleep. There is at least one x_3 for which x_3 will sleep if and only if x_3 will work.