Please help with following MCQ

question one

Datatech Ltd is currently 100% financed with equity and its weighted average cost of capital (WACC), which is the same as its cost of equity, is equal to 13%. Assuming that, the Miller and Modigliani's Proposition 1 hold (where all three of the assumptions remain in effect), and the firm is thinking about changing its capital structure to 45% debt and 55% equity, what will be the cost of equ_ity after the change if the cost of debt is 6%? Q A. 18.73% 0 B. 21.56% 0 c. 20.1% 0 D. 23.61% A three-year project has cash inflows and cash outflows which when present valued (discounted) at 12% give a Net Present Value (NPV) of zero (R0). Which one of the following statements is true? 0 A. The IRR cannot be determined from the above information. Q B. The IRR is greater than 12%. O C. The Internal Rate of Return (IRR) is 12%. O D. The IRR is less than 12%. Brimstone Ltd has a debt-to- equity ratio of 25%. Its pre-tax cost of debt is 10% and its cost of equity is 16%. The tax rate for companies is 28%. What is the company's weighted average cost of equity (WACC)? O A. 14.5% 0 B. 14.24% 0 c. 14.8% 0 D. 13.8%