59 An analyst is estimating the cost of debt for a company's 10-year non-traded bonds. She relies on an internally developed matrix of synthetic credit ratings, a portion of which is presented in the following table:

Credit Rating	Debt-to-Equity Ratio	Credit Spread (%)
AAA	Less than 0.15	0.80
AA	0.15 to 0.20	1.10
A	0.20 to 0.25	1.45
BBB	0.25 to 0.30	2.10
BB	0.30 to 0.40	2.50

The yield to maturity (YTM) on the US Treasury 10-year benchmark government bond is 5.41%. In its most recent financial statements, the company reported equity of $150.0 million and total debt of$34.5 million. The implied YTM of the company's 10-year bond is closest to: