Translate the following inference to logic notation: For all x, x_7 will not read a book. For all x, if x_7 were an electrician, then x_7 is climbing a mountain. For all x, x_7 will climb a mountain if and only if x_7 will read a book. Therefore for all x, x_7 is not an electrician.
forall x: ~P(x). forall x: Q(x) -> R(x). forall x: R(x) <-> P(x). Therefore forall x: ~Q(x).