6. [15] An insurance company must choose between two investments, each of which costs $ 1000 and produces the following net cash flows at the end of each year in Table 2. (a) [5] Compute the internal rate of return (IRR) for each project. Choose the projects according to the obtained IRRs. (b) [5] If we know the cost of capital is 15%, which project is better? 1 Table 2 Year 1 | Year 2 Year 3 Year 4 Year 5 500 400 300 200 100 100 300 400 500 600 Project A Project B (c) [5] If the cost of capital is 15% and the choices of projects in (a) and (b) are conflict, what shall we choose finally? Why