Among following cash flows, which one (s) is (are) cash Inflows at the end of project? 1. An increase of the accounts receivable. 2. A Decrease of the accounts receivable. 3. An increase of the accounts payable. 4. A decrease of the accounts payable. 1 and 4 only. 2 and 3 only. 1 and 3 only. 2 and 4 only