6. SINGAGAN is currently no debt company but considers debt financing. The following information is SINGAGAN's financial data and WACC estimates with different capital structures. SINGAGAN pays all of its earnings out as dividends. Total capital: $200,000, Shares outstanding:10,000, EBIT: $40,000, (1) Compute A and D (2) Compute B (3) Compute C and decompose C into premium for business risk and for financial risk (4) What is optimal capital structure of SINGAGAN. And what is stock price when the company achieves the optimal capital structure