please help with a-c if possible

Data table (Click on the icon here in order to copy the contents of the data table below into a spreadsheet.) WACC-Book weights and market weights Webster Company has compiled the information shown in the following table: a. Calculate the weighted average cost of capital using book value weights. b. Calculate the weighted average cost of capital using market value weights. c. Compare the answers oblained in parts a and b. Explain the differences. a. The firm's weighted average cost of capital using book value weights is \%. (Round to two decimal places.)