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Answer the following questions: (a) An engineer wishes to use a metal for manufacturing soda cans (ex: pepsi can). Just based on the cost of materials (ignore all other parameters of consideration) which material should the engineer select out of stainless steel, zinc alloys and low alloy steels? What are the volumetric costs of these materials? [2] (b) What is material performance indes? What is the recommended generalized form of the

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performance index equation? [3]