It's September 2020 and you are trying to estimate the cost of debt for a one 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 9/30/2021 Yield to Maturity 0.68% A Yes 2.35% B No 4.50% 9/30/2021 0.70% 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% Ol. 3.1% OII. 2.35% O III. 0.68% IV.4.5% V. 3.5% VI.0.7%