Translate the following inference to logic notation: For all x, y_3 will cook or y_3 is not an electrician. For all x, if y_3 were sad, then y_3 is cooking. For all x, if y_3 cooks, then y_3 is sad. For all x, y_3 is sad or y_3 is an electrician. Therefore for all x, y_3 will cook.
forall x: P(x) or ~Q(x). forall x: R(x) -> P(x). forall x: P(x) -> R(x). forall x: R(x) or Q(x). Therefore forall x: P(x).