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