3. You invest $1500 today to purchase a new tractor that is expected to generate the following revenues over the next 4 years: Year 0 Cash flow -1500 1 300 2 475 3 680 4 490 Find the internal rate of retum (IRR) from this investment. What would be the NPV if the interest rate is 10%? 4. GM has a new automated production line project it is considering. The project has a cost of $700,000 and is expected to provide after-tax annual cash flows of $142,000 for the next seven years. The firm's management is considering a modified IRR approach GM's cost of capital is 9 percent. What is the project's modified IRR