Where did you get the $0\mathrm{.}52$ from to be apart of the calculation?

A company is 48% financed by risk-free debt. The interest rate is the expected market risk premium is 7%, and the beta Of the Companys common Stock is What is tho after-tax WACC &Ssuming that the company pays tax at a rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Answer complete but not