A rectangular specimen of an alloy (150 mm x 200 mm) has been subjected to cold working treatment to increase its strength. The dimensions of the specimen after deformation became (100 mm x L mm). i. If the percentage of applied cold working is 30%, determine the length (L) of the specimen after deformation. ii. If a cylindrical specimen of the same alloy has been subjected also to cold working, after which the diameter was reduced from 13.5 mm to 10 mm, which specimen (cylindrical or rectangular) will be the hardest after cold working, and why?