Which of the following statements are false? 1. A decrease in the estimated salvage value of equipment used in a project will increase the project's NPV. 2. A loss on the sale of equipment at the end of a project, increases the equipment's after-tax salvage value. 3. The incremental cost principle is that a proposed project is analyzed based on the project's incremental cash flows. 4. An increase in the a firm's marginal tax rate will increase a project's NPV. Which of the following statements are false? 1. Pro forma financial statements are financial statements showing projected values for future time periods. 2. The concept of erosion describes expense that have already been incurred and cannot be recovered. 3. An increase in accounts payable increases working capital requirements at the beginning of a project. 4. An increase in the a firm's marginal tax rate will increase a project's NPV