Translate the following inference to logic notation: For all x, x_8 is poor if and only if x_8 is an artist. For all x, if x_8 were poor, then x_8 is a server. For all x, if x_8 were a server, then x_8 is an artist. Therefore for all x, x_8 is poor if and only if x_8 is a server.
forall x: P(x) <-> Q(x). forall x: P(x) -> R(x). forall x: R(x) -> Q(x). Therefore forall x: P(x) <-> R(x).