The management of Dakota Corporation is considering the purchase of a new machine costing $420,000. The company's desired rate of return is 10%. The present value factors for $1 at compound interest of 10% for 1 through 5 years are 0.909, 0.826, 0.751, 0.683, and 0.621, respectively. In addition to the foregoing information, use the following data in determining the acceptability of this investment: YearIncome from OperationsNet Cash Flow 1$100,000 $180,000 240,000 120,000 320,000 100,000 410,000 90,000 510,000 90,000 The present value index for this investment is a.1.14 b.1.45 c.0.70 d.1.08