RehmanBuildersInc.believethatitsoptimalcapitalstructureconsistsof60%commonequity and 40% debt, and its tax rate is 35%. Rehman must raise additional capital to fund its upcoming expansion. The firm will have PKR8million of retained earnings with a cost of 8.25%. New common stock in an amount up to PKR10million would have a cost of 14.5%. Furthermore, Rehman can raise up to PKR5 million of debt at an interest rate of 8% and an additional PKR4million of debt at 12.5%. The CFO estimates that a proposed expansion would require an investment of PKR9million. What is the WACC for the last dollar raised to complete theexpansion?