Question 6 (20 points) Maserati Corporation purchased a new machine on August 1, 2010. The cost of this machine was $150,000. The company estimated that the machine would have a salvage value of $24,000 at the end of its service life. Its life is estimated at 5 years and its working hours are estimated at 21,000 hours. Year end is December 31. Required Compute depreciation expense under the following methods> Each of the following should be considered unrelated. (a) Straight-line depreciation for 2010 (b) Units-of-production method for 2010, assuming that machine usage was 800 hourss (c) Sum-of-the-years'-digits for 2011 (d) Double-declining balance for 2011