can you solve with excel please

Question 7 10 pts Clark Landscaping Corporation has 40% debt and 60% common equity as its target capital structure. Its cost of debt before tax is 11%. The beta of the company is 1.3, the risk-free rate is 3% and the market risk premium is 7%. The firm has a marginal tax rate of 30%. a. Calculate the after-tax cost of debt. Briefly show your calculations. Round to two decimal places. b. Calculate the cost of equity based on the information provided. Briefly show your calculations. Round to two decimal places