Net sales, net income, and total assets for Alex Shipping, Inc., for a five-year period follow: (Click the icon to view the data.) Read the equirements. Requirement 1. Calculate trend percentages for each item for 2018 through 2021. Use 2017 as the base year and round to the nearest percent. Requirements 1. Calculate trend percentages for each item for 2018 through 2021. Use 2017 as the base year and round to the nearest percent. 2. Calculate the rate of return on net sales for 2019 through 2021 , rounding to the nearest one-tenth percent. Explain what this means. 3. Calculate asset turnover for 2019 through 2021. Explain what this means. 4. Use a DuPont Analysis to calculate the rate of return on average total assets (ROA) for 2019 through 2021. 5. How does Alex Shipping's return on net sales for 2021 compare with previous years? How does it compare with that of the industry? In the shipping industry, rates above 9% are considered good, and rates above 11% are outstanding. 6. Evaluate the company's ROA for 2021 , compared with previous years and against an 18% benchmark for the industry. Data table