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Question 2 (15 pts) A consumer has preferences represented by the utility function ufa,y)ty. (This means that Muy and Muy ly 1) a. What is the marginal rate of substitution? b. Suppose that the price of good x is 2, and the price of good y is 1. The consumers income is 20. What is the optimal quantity of x and y the consumer will choose? c. Suppose the price of good x decreases to 1. The price of good y and the consumers income consumer increase his consumption of x after the price are unchanged. How much will the change? d. Based on your calculations in part b and c, what is the own price elasticity of demand for good x?
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