c Serpil's utility function is U(B,C)= B · C , where B = veggie burgers per week and C = packs of cigarettes per week. %3D a) What is her marginal rate of substitution if veggie burgers are on the vertical axis and cigarettes are on the horizontal axis? b) Serpil's income is $120, the price of veggie burger is $2, and that of a pack of cigarettes is $1. How many burgers and how many packs of cigarette does Serpil consume to maximize her utility? Illustrate your answers in a graph.

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