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_7, if x_7 plays squash, then x_7 is cooking. For all x_7, x_7 is fast. For all x_7, x_7 will play squash and x_7 is a writer.
For all x_7, x_7 will play squash can be inferred via the universal simplification rule. For all x_7, x_7 is a writer can be inferred via the universal simplification rule.