The stock is currently selling for $15.25 per share, and its noncallable $1,000 par value, 20-year, 7.25% bonds with semiannual payments are selling for $875.00. the beta is 1.25, the yield on a 6-month treasury bill is 3.50%, and the yield on a 20-year treasury bond is 5.50%. the required return on the stock market is 11.50%, but the market has had an average annual return of 14.50% during the past 5 years. the firm's tax rate is 40%.refer to the data for the collins group. which of the following is the best estimate for the weight of debt for use in calculating the firm's wacc? a.18.67%b.21.61%c.22.69%d.20.58%e.1 9.60%