Can some help answer #4 please? The homework assignment is due tomorrow. Thank you so kindly.

Find the hourly operating cost for the first year of life of the tractor of Problem 3. Use the following additional data. Determine the probable average cost per hour over the life of the equipment for owning and operating a bottom-dump wagon under the conditions listed below. Use the straight-line method of depreciation. A crawler tractor costs $250, 000 and has an estimated salvage value of $50, 000 and a 5-year life. Find the annual depreciation and book value at the end of each year using the double-declining-balance method of depreciation. Analyze the cost of renting, leasing, and purchasing a backhoe loader using the data given below. Evaluate after-tax cash flow and its present value. For the project whose data are shown below, plot the cumulative project expenditures, value of work, and progress payments received versus time. What is the contractor's maximum negative cash flow and when does it occur? Progress payments are calculated at the end of each month and received the middle of the following month. Retainage is 10% until project completion. Assume that final project payment, including released retainage, is received the middle of the month following project completion