Having trouble with this problem. If possible, show work in excel. Thank you!

1. The current risk-free rate of interest is 2% and the expected return on the market is 5%. a. Calculate the cost of equity (required rate of return) for a stock with a Beta =1.28. b. Using EXCEL's Data Table feature create a two-way data table to determine the cost of equity by varying both the expected market return and the risk-free rate of interest. Use expected market return values of 8% through 14% in increments of 2% and risk-free interest rate values of 2% through 8% in increments of 2%. c. Using EXCEL's Text Box Feature explain the impact of changing the expected market return and the risk-free rate of interest on the stock's cost of equity