rewrite this; The Net Present Value (NPV) and Internal Rate of Return (IRR) are two key methods used to evaluate investment projects, but they differ in several important ways. NPV is expressed in dollar terms and represents the total value a project adds to the firm; a project is accepted if its NPV is greater than zero. IRR, on the other hand, is expressed as a percentage and represents the rate at which the project breaks even; the project is accepted if the IRR exceeds the required rate of return. One key distinction is that NPV assumes cash flows are reinvested at the discount rate, while IRR assumes reinvestment at the project's own internal rate, which can sometimes be unrealistic. Additionally, NPV is generally more reliable when dealing with non-conventional or irregular cash flows, whereas IRR can be misleading in such cases by producing multiple rates or none at all