21. You are considering an investment in a mutual fund with a 4% load and expense ratio of .5%. You can in- vest instead in a bank GIC paying 6% interest. a. If you plan to invest for 2 years, what annual rate of return must the fund portfolio earn for you to be bet- ter off in the fund than in the GIC? Assume annual compounding of returns. b. How does your answer change if you plan to invest for 6 years? Why does your answer change? c. Now suppose that, instead of a front-end load, the fund expense ratio is 1.25% per year. What annual rate of return must the fund portfolio earn for you to be better off in the fund than in the GIC? Does your answer in this case depend on your time horizon