Need help wit both

Given the following cash flow in k$. Find the NPV (Net Present Value) at 20% peryear and at 25% per year. Calculate the IRR (Internal Rate of Return). Assume that an excavating machine is purchased for $20,000. Hourly gas and oil charges will be $6.20. (Assume 1,500 hours/year usage). A major overhaul of the engine will be needed in three years at a cost of $4,000. After six years, the trade-in value will be $1,500. What is the total present worth of the machine over its six-year life if money is borrowed at 12% What is the equivalent uniform annual cost