Translate the following inference to logic notation: For all x, x_11 will read a book if and only if x_11 is a cashier. For all x, if x_11 were a cashier, then x_11 is not curious. For all x, x_11 is curious. If Jennifer were a sailor, then Richard is reading a book. Therefore Jennifer is not a sailor.
forall x: P(x) <-> Q(x). forall x: Q(x) -> ~R(x). forall x: R(x). p -> P(a). Therefore ~p.