Year Cash Flow 0 -$200 1 50 2 60 3 70 4 200 Given the above cashflows of a project, calculate its payback, discounted payback, IRR, NPV, profitability index. Assume the discount rate is 9%. Show your detail work to get the answers, i.e., if you use financial calculators, write down the detail process, if you use the formulas, write down the formulas you use with the actual numbers.