Problem 4-22 You are considering an investment in a mutual fund with a 3% load and expense ratio of 0.1%. You can invest instead in a bank CD paying 2% interest a. If you plan to invest for 4 years, what annual rate of return must the fund portfolio earn for you to be better off in the fund than in the CD? Assume annual compounding of returns (Do not round intermediate calculations. Round your answer to 2 decimal places.) Annual rate of return b. What annual rate of return must the fund portfolio earn if you plan to invest for 7 years to be better off in the fund than in the CD? (Do not round intermediate calculations, Round your answer to 2 decimal places.) Annual rate of totum c. Now suppose that instead of a front-end load the fund assesses a 12b-1 fee of 80% per year. What annual rate of return must the fund portfolio earn for you to be better off in the fund than in the CD? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Annual rate ofron