It's September 2020 and you are trying to estimate the cost of debt for a 10 year project at Boeing. Boing is currently rated BBB by S&P and you have collected the following information on its bonds. Given this information, what is the best estimate for the cost of debt for this project?

Bond Symbol	Callable	Coupon Rate	Maturity Date	Yield to Maturity
A	Yes	2.35%	9/30/2021	0.68%
B	No	4.50%	9/30/2021	0.70%
C	No	3.10%	9/30/2025	2.45%
D	Yes	1.20%	8/15/2029	3.31%
E	No	5.65%	7/30/2030	3.50%
F	No	7.00%	8/15/2035	3.65%
G	No	4.50%	9/30/2040	4.00%

	I.	3.1%
	II.	0.7
	III.	2.45%
	IV.	2.35%
	V.	3.5%
	VI.	5.65%