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 makes tea, then x_5 is working. For all x_5, if x_5 were a sailor, then x_5 is playing squash. For all x_5, x_5 will make tea or x_5 will play tennis. For all x_5, if x_5 plays tennis, then x_5 is a sailor. For all x_5, if x_5 works, then x_5 is playing squash.
For all x_5, if x_5 makes tea, then x_5 is playing squash can be inferred via the universal transitivity rule. For all x_5, if x_5 plays tennis, then x_5 is playing squash can be inferred via the universal transitivity rule.