Which two of the following five statements are correct? Select two alternatives: Overhead expenses are associated with activities that are not directly attributable to a single business activity but instead affect many different areas of the corporation. Sunk costs are incremental with respect to the current decision regarding the project and should be included in its analysis. Project externalities are direct effects of the project that may increase of decrease the profits of other business activities of the firm. When computing the incremental earnings of an investment decision, we should include all changes between the firm's earnings with the project versus firm's earnings without the project. When we are certain regarding the input to a capital budgeting decision, it is often useful to determine the break-even level of that input