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P13.15 Chee Chew's portfolio has a beta of 1.3 and earned a return of 12.9% during the year just ended. The risk-free rate is currently 4.2%. The return on the market portfolio during the year just ended was 11.0%. a. Calculate Jensen's measure (Jensen's alpha) for Chee's portfolio for the year just ended. obrod b. Compare the performance of Chee's portfolio found in part a with that of Carri Uhl's portfolio, which has a Jensen's measure of -0.24. Which portfolio per- formed better? Explain. c. Use your findings in part a to discuss the performance of Chee's portfolio during the period just ended