Problem 2 (7 points): Your firm purchased an earth hauler for $80,000. The new equipment earns $50,000 for the company every year. Following are the costs associated with operation and maintenance of the hauler. a) Annual Operation Costs (fuel, operator, oil): $20,000 b) Tire Replacement at end of years 2 and 4: $11,000 c) Major Repair at the end of year 3: $15,000 d) Salvage Value at the end of 5 years: $8,000 If the marginal tax rate is 25%, determine the return on investment (using IRR method discussed in (Use straight line depreciation and operations and maintenance costs cannot be depreciated). Determine the return on investment, if the marginal tax rate is 10%.