Refer to the consolidated statements of cash flows in the Campbell Soup Company annual report in the appendix. Required: a. Identify the two most significant sources of cash from operating activities during 2017 How much of a cash source amount do these Items represent? (Enter your answers in millions.) Depreciation and amortization expense Net earnings Cash provided by the two most significant operating sources $ 0 b. What was the firm's most significant investing activity during 2017, and how much cash did this activity use or generate? (Enter your answers in millions. Negative amounts should be indicated by a minus sign.) Purchases of plant assets