Translate the following inference to logic notation: For all x, if x_10 reads a book, then x_10 is an artist. For all x, if x_10 were an artist, then x_10 is reading a book. If David reads a book, then Susan is an electrician. Therefore if David were an artist, then Susan is an electrician.
forall x: P(x) -> Q(x). forall x: Q(x) -> P(x). P(a) -> p. Therefore Q(a) -> p.