Maserati Spa purchased a new machine for it assembly process in August 1, 2022. The cost of this machine was $150,000. The company estimated that the company would have a residual 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.

Compute the depreciation expense under the following methods.Each of the following should be considered unrelated.

a. Straight-line depreciation for 2022

b.Activity method for 2023, assuming that machine usage was 800 hours

c.SUm-of-the-years digits for 2023

d. Double-declining-balance for 2023.

please show your step by step computations for each method a,b,c and d. Show the steps for each method in details please.