DQ #1: Marginal Rate of SubstitutionWhat is the marginal rate of substitution (MRS) and why does it diminish as the consumer substitutes one product for another? Use examples to illustrate.DQ #2: Demand ElasticityHainer, R. (2010) Article: http://www.cnn.com/2010/HEALTH/04/24/social.smokers/index.htmlPlease, read the article Hainer, R. (2010), provided in the required readings section for this week. The tobacco industry is a prime example to consider when talking about price elasticity of demand. While nicotine use can be addictive for many users, it is not addictive for the so-called “social smokers”.What can we say about the price elasticity of demand for nicotine products (such as cigarettes, pipes, tobacco) in the group of nicotine addicted users, versus the group of “social smokers”? Can we say whose demand is likely to be more elastic? Why?