Use the uploaded price data to answer the questions that follow. Assume that the S&P 500 is the proxy for the market portfolio.

A: Price data for the American Funds Growth Fund of America (ticker symbol AGTHX) and S&P 500 is given in the Excel Upload file. Each month, calculate the excess returns for both AGTHX and the S&P 500.

B: Using the excess returns, estimate the fund's alpha and beta (assume that the CAPM is the appropriate benchmark model). What is the 95% confidence interval for beta?

C: Does AGTHX significantly outperform, significantly underperform, or perform as expected (again using CAPM as the benchmark model)? Why?

please show calculations in excel