17. If you insulate your office for $22,000, you will save $2,200 a year in heating expenses These savings will last 25 years. What is the NPV of the investment when the cost of capital is 5% ? 18. What is the IRR of the investment? 19. Marielle Machinery Works forecasts the following cash flows on a project under consideration. It uses the internal rate of return rule to accept or reject projects. What is the proje-10os 20. Should this project be accepted if the required return is 13% ? 21. You are offered the chance to participate in a project that produces the following cash flows. The internal rate of return is 13.6%. If the opportunity cost of capital is 12%, would you accept this offer? (aka solve for the NPV of the project and would you accept?)