plz help me to find the answer for question 9 thank u

A firm has $150 million in equity and $350 million in debt. The firm recently issued bonds at the market required rate of 10%. The firm's beta is 1.2, the risk-free rate is 5%, and the expected return in the market is 15%. Assume the firm is at their optimal capital structure and the firm's tax rate is 30%, what is the firm's weighted average cost of capital (WACC)? 9. (5 Marks) 10. a. State the differences between a conventional and a non-conventional cash flow. In