Following information is available about Riana company: Cost of debt After-tax cost of debt 4.90% Cost of equity Treasury bond rate (risk free rate) 4% Beta 0.62 Risk premium 8% 2014 2015 2016 2017 Capital structure % net debt 25.0% 25.5% 26.0% 26.5% % equity 75.0% 74.5% 74.0% 73.5% Required 1. Calculate cost of debt (before tax) each of the year from 2014 to 2017 2. Calculate cost of Equity each of the year from 2014 to 2017 3. WACC (Weighted average cost of capital)