. Critically differentiate between the three main models of working capital management. (15 marks) b. Is it possible to use financial ratios to determine the model of working capital management applied at a company? If yes, which ratio will be more useful and provide an interpretation of how the ratio can be used to determine what model of working capital management is applied at a particular firm. (5 marks) c. Determine which of the three working capital management approaches will be more appropriate for a construction company that specializes in the building of domestic and commercial buildings. Provide reasonable justification for your response.