Net sales, net income, and total assets for Alexander Construction, Inc., for a four-year period follow: (Click the icon to view the data.) Read the 1. Compute trend percentages for each item for 2015 through 2018. Use 2015 as the base year. 2. Compute the return on assets for 2016,2017 , and 2018 . Round your answers to three decimal places. 3. Alexander Construction's main competitor had a return on assets of just under 40 percent for the years 2016, 2017, and 2018. How does Alexander Construction, Inc.'s return on assets compare with that of its main competitor? Requirement 1. Compute trend percentages for each item for 2015 through 2018 . Use 2015 as the base year. (Round to the nearest whole percent, X%.)