Translate the following inference to logic notation: For all x, if x_4 were an artist, then x_4 is a taxi driver. For all x, if x_4 were a taxi driver, then x_4 is reading a book. For all x, if x_4 reads a book, then x_4 is an artist. Therefore for all x, if x_4 were an artist, then x_4 is reading a book.
forall x: P(x) -> Q(x). forall x: Q(x) -> R(x). forall x: R(x) -> P(x). Therefore forall x: P(x) -> R(x).