please solve the table below and show all formulas used. thanks

Problem 15-5b Tax Rate 16 17 18 19 2n Amount Weight Cost After-tax Cost Weighted Average 11117722? NOCO Funding Source Equity (Stock Sales) Equity (Retained Earnings) Debt (Bank Loans) Total 22 24 MARR 15-5b An engineering firm has borrowed $1.0M at 6%. The stockholders have invested another $1.5M. The firm's retained earnings total $1.2M. The return on equity is estimated to be 12%. What is the firm's cost of capital: (b)After taxes with a tax rate of 28%