13. Suppose a teenager likes both rap music (R) and country music (C) with a set of preferences so that U = C1/2R1/2. Which point (C, R) makes the

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13. Suppose a teenager likes both rap music (R) and country music (C) with a set of preferences so that U = C1/2R1/2. Which point (C, R) makes the teen the happiest?