please answer question c

. You are deciding between two mutually exclusive investment opportunities. Both require t same initial investment of $9.8 million. Investment A will generate $2.01 million per ye (starting at the end of the first year) in perpetuity. Investment B will generate $1.47 million the end of the first year and its revenues will grow at 2.6% per year for every year after that. a. Which investment has the higher IRR? b. Which investment has the higher NPV when the cost of capital is 7.8%? C. In this case, for what values of the cost of capital does picking the higher IRR give t correct answer as to which investment is the best opportunity