Great Seneca Inc. sells $$100$ million worth of $19-$year to maturity $9\mathrm{.}56\%$ annual coupon bonds. The net proceeds $($proceeds after flotation costs$)$ are $$995$ for each $$1,000$ bond. The firm's marginal tax rate is $35\%.$ What is the after$-$tax cost of capital for this debt financing?

Round the answer to two decimal places in percentage form. $($Write the percentage sign in the "units" box$)$

You should use Excel or financial calculator.