Year 0 1 2 3 4 5 6 7 8 9 Cash Flows -500,000,000 60,000,000 90,000,000 170,000,000 230,000,000 205,000,000 140,000,000 110,000,000 70,000,000 -80,000,000 Calculate: a. NPV b. payback period and discounted payback period C. IRR d. profitability index Based on your analysis, should the company open the mine? Year 0 1 2 3 4 5 6 7 8 9 Cash Flows -500,000,000 60,000,000 90,000,000 170,000,000 230,000,000 205,000,000 140,000,000 110,000,000 70,000,000 -80,000,000 Calculate: a. NPV b. payback period and discounted payback period C. IRR d. profitability index Based on your analysis, should the company open the mine