see the exihibts , a.Now, let's look at the beta estimates from Exhibit 10 and focus only on the 21 months betas calculated from the NYSE Composite Index as well as other non-beta information available to you in Exhibit 10. Please calculate what you believe is the best appropriate estimate of the levered beta for Boeing's commercial aircraft manufacturing business segment. Be sure tofully explain your work and assumptions as you go through the steps to develop your estimate.