Which of the following statements about capital budgeting tools are correct? I. In comparing two projects, one should use the net present value (NPV) over the internal rate of return (IRR) because NPV properly takes into account the differences in project scale. II. It is crucial to know what the proper discount rate is in estimating the net present value (NPV) for a project. III. In comparing two projects, one should use the internal rate of return (IRR) over the net present value (NPV) because IRR properly takes into account the differences in project scale. IV. It is crucial to know what the proper discount rate is in estimating the internal rate of return (IRR) for a project. V. Analytical results from the payback period rule always agree with the results from the net present value (NPV) but disagree with the results from the internal rate of return (IRR). VI. The payback period rule is the most widely used decision tool because it properly accounts for the time value of money and long- term risk