Any expert can help me solve every part in this ques?

The following information is given: The firm's bonds mature in 20 years, have an 8% annual coupon, a par value of RM1,000, at a price of RM1050. The company tax rate is 40% -The risk free rate is 4.5%, the market risk premium is 5.5%, and the stock beta is 1.20 -The target capital structure consists of 35% and 65% common equity. The firm's cost of equity (r.) is The firm's after tax cost of debt (ra) is The firm's WACC is % (Round off your final answer to 2 decimal points)