Assume that on September 30, 2018 euro air, an international airline based in Germany, purchased an aircraft at a cost of $4,500,000 and expect to remain useful for four years (4,00,000 miles) and to have a residual value of $6,00,000 euro air will fly the plane 35,000 miles during the remainder of 2018 compute euro air's depreciation on the plane for the year ended December 31, 2018 using units of production method:

a. Straight-line

b. Units-of-production

c. Double-declining-balance

Which method would produce the highest net income for 2018? Which method produces the lowest net income?