Please show full workings in excel.

Thomas manages an investment firm. His firm's investment fund has a beta of 0.7. The market risk premium is 6% and the risk-free rate is 2%. Thomas forecasts the fund to provide annual return of 7% before fees and will charge management fees of only 1%. [2 points) a. Calculate the alpha (a) generated by Thomas' fund before management fees. b. Calculate the alpha (a) generated by Thomas' fund after management fees