Heatwave Gaming develops, markets, and publishes electronic games. ZipTrain is one of the largest railway networks in the nation, with over 27,000 miles of railroads. The following data were taken from each of the companies' December 31, 2017, annual reports. Revealing which data relate to which company was intentionally omitted. The dollar amounts are in millions Company 1 1 Company 2 Sales $7.930 $1,902, 100 Depreciation costs 810 57,080 Net earnings 318 95,729 Current assets 3,138 1,282, 143 Property, plant, and equipment 19,960 339,900 Total asuta 24,951 2.535,680 Required a. Calculate depreciation costs as a percentage of sales for each company. (Round your percentage answers to 2 decimal places lie., 0.0123 is entered as 1.23%).) b. Calculate property, plant, and equipment as a percentage of total assets for each company (Round your percentage answers to 2 decimal places i.e., 0.0123 is entered as 1.23%).) c. Based on the information now available to you, which company is Ziptrain? d. Which company appears to be using its assets most efficiently