The cash flow statements for retailing giant BigBox, Inc. spanning the period 20132016 are found here:

(US$ millions) 12/31/2016 12/31/2015 12/31/2014 12/31/2013 Net Income $13,050 $12,090 $11,070 $10,040 Depreciation Expense 6,520 6,280 5,040 4,010 Changes in Working Capital 1,150 2,290 2,430 1,040 Cash from Operating Activities $20,720 $20,660 $18,540 $15,090 Capital Expenditures $(16,050) $(14,470) $(14,030) $(12,260) Cash from Investing Activities $(16,050) $(14,470) $(14,030) $(12,260) Interest and Financing Cash Flow Items $(370) $(250) $(390) $130 Total Cash Dividends Paid (3,570) (2,800) (2,500) (2,210) Issuance (Retirement) of Stock (7,980) (1,470) (3,600) (4,500) Issuance (Retirement) of Debt 1,470 (150) 3,950 4,120 Cash From Financing Activities $(10,450) $(4,670) $(2,540) $(2,460) Net Change in Cash $(5,780) $1,520 $1,970 $370

a. Did BigBox generate positive cash flow from its operations?

b. How much did BigBox invest in new capital expenditures over the period?

c. Describe BigBox's sources of financing in the financial markets over the period.

d. Based solely on the cash flow statements for 2013 through 2016, write a brief narrative that describes the major activities of BigBox's management team over the period.