WACC$-$Book weights and market weights Webster Company has compiled th 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 obtained in parts a and $b.$ Explain the differences.

a$.$ The firm's weighted average cost of capital using book value weights is $\%.$ to two decimal places.$)$

Data table

$($Click on the icon here $$ in order to copy the contents of the data table below into a spreadsheet.$)$

$\backslash$table$[[$Source of capital,Book value,Market value,After$-$tax cost$],[$Long$-$term debt,$$4,000,000,$$$3,960,000,6\%$