Using the mutual fund - American Funds Growth Fund of America (AGTHX). Discuss and show various expenses of your chosen fund. What is its expense ratio? Go to its website or Morningstar.com and get its annual returns for the past five years. Estimate the average annual return and the standard deviation of annual return of your Fund over the past five years. Do the same for the S&P 500. Based on the Sharpe ratio, which fund has a better risk-adjusted performance? Assuming an average risk-free rate of 2 % over the past 5 years.