Ola limited has 4 divisions of Operating in Warri, Port-Harcourt, Lagos and Kaduna Total Asset Warri 6 million Total Asset Port-Harcourt 5 million Total Asset Lagos 7 million Total Asset Kaduna 9 million Total Sales Warri 10 million Total Sales Port-Harcourt 15million Total Sales Lagos 18million Total Sales Kaduna 14million Total Cost Warri 9million Total Cost Port-Harcourt 13.5million Total Cost Lagos 16.8million Total Cost Kaduna 13million Cost of Capital Warri 4% Cost of Capital Port-Harcourt 18% Cost of Capital Lagos 16% Cost of Capital Kaduna 10% You are required to calculate: Annual return on investment and residual income and advice which one is the best