Which of the following statements are true?

1) Operating liabilities are non-interest bearing, so firms should try to maximize the financing of their assets with these sources of funds

2) Inventory and accounts payable is negatively related

3) Accrued liabilities can facilitate managers to shift the income among periods

4) All of them

5) Only 1 and 4

6) Only 1 and 3

7) Only 1,2 and 3

8) Only 1, 3 and 4