3. Rick purchases two goods: x and y. He has a diminishing marginal rate of substitution of x for y. Suppose the price of x increases from P to P2. On a clearly labeled graph, show the income and substitution effects of the price change on the consumption of x. a. Case 1: Food is a normal good. 00 PM b. Case 2: The income elasticity of demand for food is zero. c. Case 3: Food is an inferior good