What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 will read a book. There is at least one x_12 for which x_12 will play tennis. For all x_12, x_12 will play tennis if and only if x_12 is an astronaut.
There is at least one x_12 for which x_12 will play tennis and x_12 will read a book. There is at least one x_12 for which x_12 will read a book and x_12 will play tennis. For all x_12, if x_12 plays tennis, then x_12 is an astronaut. For all x_12, if x_12 were an astronaut, then x_12 is playing tennis.