What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: For all x_5, if x_5 plays squash, then x_5 is not taking a plane. For all x_5, x_5 will listen to a song. For all x_5, x_5 will take a plane.
For all x_5, x_5 will not play squash can be inferred via the universal modus tollens rule. For all x_5, x_5 will listen to a song and x_5 will take a plane can be inferred via the universal conjunction rule. For all x_5, x_5 will take a plane and x_5 will listen to a song can be inferred via the universal conjunction rule.