1. In December 2021, your company faces a decision to bid for a eight-year lease on a coal mine offered by the government. The lease gives the winner of the auction the right to actually develop the mine for four years. Once development takes place (if ever at all), the leaseholder can extract 25 million tons of coal per year for exactly four years with the fixed extraction cost of $4 per ton. Development of the minc costs $50 million. There are no reclamation costs at the end of the life of the mine. If development did not take place by December 2025 (four ycars down the road), then the case would end at that time. At the time of the auction, the spot price of coal was $4.58. The risk-free rate of interest is 6% per year and the net convenience yield on coal is 3.5% per year, both of which are constant and compounded continuously. The standard deviation of log changes in coal prices is 15% per year. Development costs are depreciated on a straight-linc basis over four years. There are no net working capital requirements. The marginal tax rate of your company is 10%. There is no inflation. (a) Suppose that your company commits to an immediate development of the minc. What is the maximum amount that your company should bid in the auction for the lease? (b) Build a four-step binomial tree with a time step set equal to one year. Calculate the value of the lease by the real options approach. (c) Now, your company knows that the government might terminate the lease (if development has not occurred) at the beginning of the fourth year with a 10% chance. However, if development has started at or before the end of the third year, there is no risk of a government termination of the lease. Redo part (b). Why is the value of the lease different from that in part (b)? 1. In December 2021, your company faces a decision to bid for a eight-year lease on a coal mine offered by the government. The lease gives the winner of the auction the right to actually develop the mine for four years. Once development takes place (if ever at all), the leaseholder can extract 25 million tons of coal per year for exactly four years with the fixed extraction cost of $4 per ton. Development of the minc costs $50 million. There are no reclamation costs at the end of the life of the mine. If development did not take place by December 2025 (four ycars down the road), then the case would end at that time. At the time of the auction, the spot price of coal was $4.58. The risk-free rate of interest is 6% per year and the net convenience yield on coal is 3.5% per year, both of which are constant and compounded continuously. The standard deviation of log changes in coal prices is 15% per year. Development costs are depreciated on a straight-linc basis over four years. There are no net working capital requirements. The marginal tax rate of your company is 10%. There is no inflation. (a) Suppose that your company commits to an immediate development of the minc. What is the maximum amount that your company should bid in the auction for the lease? (b) Build a four-step binomial tree with a time step set equal to one year. Calculate the value of the lease by the real options approach. (c) Now, your company knows that the government might terminate the lease (if development has not occurred) at the beginning of the fourth year with a 10% chance. However, if development has started at or before the end of the third year, there is no risk of a government termination of the lease. Redo part (b). Why is the value of the lease different from that in part (b)