What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, y will cook if and only if y will work. For all y, y will not work. Richard is cooking if and only if it is cloudy.
If Richard cooks, then it is cloudy. If it is cloudy, then Richard is cooking. For all y, if y cooks, then y is working. For all y, if y works, then y is cooking. For all y, y will not cook.