Calculate ROI for geographic segments; analyze results-McDonald's Corp. McDonald's conducts operations worldwide and is managed in three primary geographic segments: U.S., International Lead Markets (including Australia, Canada, France, Germany, and the UK), and High Growth Markets (including China, Italy, Korea, Poland, Russia, Spain, Switzerland, and the Netherlands). A hybrid geographic/corporate segment, Foundational Markets & Corporate, reports on the results of all other countries as well as any unallocated amounts. McDonald's allocates resources to, and evaluates the performance of, its segments based on operating income. The asset totals disclosed by geography are directly managed by those regions and include accounts receivable, inventory, certain fixed assets, and certain other assets. Corporate assets primarily include cash and cash equivalents, investments, deferred tax assets, and other assets. Refer to the following geographic segment data (in millions) from the 2017 annual report of McDonald's Corp.: Page 39 U.S. International Lead Markets High Growth Markets Foundational Markets & Corporate Total Company Revenues 2017 $ 8,006.4 $ 7,340.3 $5,533.2 $ 1,940.5 $22,820.4 2016 8,252.7 7,223.4 6,160.7 2,985.1 24,621.9 2015 8.558.9 7,614.9 6,172.8 3,066.4 25,413.0 Operating income 2017 $ 4,022.4 $ 3,166.5 $2,001.4 $ 362.4 $ 9,552.7 2016 3,768.7 2,838.4 1,048.8 88.6 7,744.5 2015 3,612.0 2,712.6 841.1 (20.2) 7,145.5 Depreciation and amortization expense 2017 $ 524.1 $ 461.1 $ 231.7 $ 146.5 $ 1,363.4 2016 510.3 451.6 362.0 192.6 1,516.5 2015 515.2 460.9 363.9 215.7 1,555.7 Assets 2017 $12,648.6 $11,844.3 $4,480.7 $ 4,830.1 $33,803.7 2016 11,960.6 9,112.5 5,208.6 4,742.1 31,023.9 2015 11,806.1 11,136.3 5,248.6 9,747.7 37,938.7 Required: a. Based on a cursory review of the data, can you identify any significant trends in the consolidated totals? Are there any notable trends in the data for specific business segments