Which of the following statements is true? In cash flow estimation, the existence of side-effects should not be included even if those side-effects have any effects on the firm's long-run cash flows. Changes in net working capital should not be reflected in a capital budgeting cash flow analysis because capital budgeting relates to fixed assets, not working capital. If debt is to be used to finance a project, then when cash flows for a project are estimated, interest payments should be included in the analysis. If an investment project would make use of land which the firm currently owns, the project should be charged with the opportunity cost of the land.