True/False (to show your answers, write "true" or "false" next to each of "(a)"+ "(b)" etc.): (a) For any two sets A and B,AB=BA (b) For any two sets A and B,AB=AB (c) The power set of a finite set must be finite (d) If A and B are finite sets, then the size of the Cartesian product (AB) is A+B (e) For any two sets A and B,AB=BA.