Translate the following inference to logic notation: For all x, x_3 is a musician and x_3 is a poet. For all x, x_3 is an astronaut. Therefore for all x, x_3 is an astronaut and x_3 is a musician.
forall x: P(x) and Q(x). forall x: R(x). Therefore forall x: R(x) and P(x).