Mwanamuona Assignment Swed 2 If you insulate your office for $23.000, you will save $2.300 a year in heating expenses. These savings will last forever a. What is the NPV of the investment when the cost of capital is 8M? 10%? Na Cost of Capital NPV 10% Preferences b. What is the IRR of the investment? (Enter your answer as a whole percent.) IRR c. What is the payback period on this investment? Payback period yours