What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, x_7 is an astronaut if and only if x_7 will play tennis. For all x_7, x_7 is not an astronaut. There is at least one x_7 for which if x_7 listens to a song, then x_7 is poor. For all x_7, x_7 will play tennis if and only if x_7 is poor.
For all x_7, if x_7 were an astronaut, then x_7 is playing tennis. For all x_7, if x_7 plays tennis, then x_7 is poor. For all x_7, if x_7 plays tennis, then x_7 is an astronaut. For all x_7, if x_7 were poor, then x_7 is playing tennis. For all x_7, x_7 will not play tennis.