oiten Guthitters inc. believes that its oqtimal coptol structure consats of 45% common equity and 55% debt, and its tax rate is 25%. Otsen must raisen additional capital to fund its upcaming expansion. The firm will have 11 milion of retained earnings with a cost of r4=13%. New common stock in an amount up to s6 million would have a cost of ro=14.5%. Furthermore, Oisen can raise up to 54 million of debt at an interest rate of fic =10% and an additional s6 million of debt at fo =1396. The CFO estimates that a proposed expansion would require as investrment of $4.4 million. What is the WACc for the last doliar raised to complete the expansion? Round your answer te two decimal places