Look at the Apple's 2018 10-K annual report (attached to this question). Use the data from the consolidated statements of cash flows, balance sheets and income statement in the annual report to answer the following:

a. What were Apple's operating, investing, and financing cash flows in years 2018, 2017 and 2016? Draw a chart in Excel to show the dynamics over time among these three cash flow activity groups. Overall, how did the cash flows change from 2016 through 2018?

b. Based on the analysis of the three categories (operating, investing, and financing) what are the possible explanations for the overall change in cash flows? How did the cash flows to investors (FCF), cash flows to creditors, and cash flows to shareholders change over these years?