1a)Why do we need to study ratio analysis? People in what roles would make good use of it? b)If a company has a number of days in inventory higher than the industry average or higher than the company's previous year, should that be a reason for concern? Why? c)If a company has a number of days in accounts receivable higher than the industry average or higher than the company for the previous period, should that be a source of concern? Why? What might that indicate? d)What is the business operating cycle? How can we calculate the number of days in the operating cycle?