a. Which investment has the higher IRR? b. Which investment has the higher NPV when the cost of capital is 6.4% ? c. In this case, for what values of the cost of capital does picking the higher IRR give the correct answer as to which investment is the best opportunity? a. Which investment has the higher IRR? The IRR of investment A is %. (Round to the nearest integer.) The IRR of investment B is \%. (Round to the nearest integer.) Which project has the higher IRR? . (Select from the drop-down menu.) b. Which investment has the higher NPV when the cost of capital is 6.4% ? The NPV of investment A is $ million. (Round to two decimal places.) The NPV of investment B is $ million. (Round to two decimal places.) You should pick investment . (Select from the drop-down menu.) A. The IRR rule will give the correct answer for discount rates greater than 12.78% but less than 20%. B. The IRR rule will give the correct answer for discount rates less than 12.78%