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, x_3 will not play tennis. For all x_3, if x_3 were happy, then x_3 is playing tennis. For all x_3, x_3 is happy or x_3 will not play tennis.
For all x_3, x_3 is not happy. For all x_3, if x_3 plays tennis, then x_3 is happy.