DE 10-8 At the beginning of 20X1. Vantas Airways purchased a used Boeing MD-11 aircraft at a cost of $36.000.000. Vantas expects the plane to remain useful for five years (5 million miles) and to have a residual value of $6.000.000. Vantas expects the plane to be flown 750.000 miles the first year and 1.250,000 miles the fifth year. Compute Vantas's fifth-year depreciation on the plane using the following methods:

a. Straight-line

b. Units-of-production

c. Double-declining-balance (you must compute depreciation for all five years).