Consider a metal that is subjected to cold working by rolling it to a lesser thickness or hammering it. (a) Would you expect the yield strength to be affected by this; and if so, should it increase of decrease? Justify your answer. (b) Answer the same question for ductility of the material. b. Explain how you can experimentally measure Poisson's ratio of isotropic materials. c. Explain why thermoplastic polymers typicallyexhibit highertoughness than thermosetting polymers.