State whether the following statements are true or false, always justifying the answer. a) The vertex factor of QED does not depend on the energy of the particle. b) The Dirac equation describes the A+ baryon. c) The antisymmetrization of the total amplitude would not apply because of the exchange of Ws in the Feynman diagrams. d) To nd the shock section of a standard particle experiment it would not be necessary to use the Casimir trick. c) There is no CP violation in the leptonic sector within the original standard model. f) About 95% of the universe is not described using the particles studied in class