oisen Outhitiers thc, beiieves that its petimal capitai structure conssts of 70% common equity and jo\% debt, and its tax rate is 25%. Oisen must raise addibional capital to find its Furthermare, Oisen can raise up to 34 million of debt at an interest rote of rd=9% and an additional 56 millian of debt at ra =10%. The Cro estimiates that a proposed eratanticin would require an investrment of $8.6 millien. What is the WACC for the last dollac rased to complete the expansion? Round your answer to twa decimal places