help with questions 4 and 7 please and thank you

Powers Co. purchased equipment for $200,000 on January 1,2018 . The equipment has an estimated service life of 8 years and an estimated residual value of $20,000. Compute the depreciation expense for 2018 (year 1) using the sum-of-the-years' digits method. Input your answer without dollar signs $.. for example. If your answer is $10,000, input 10,000 as the solution. Question 4 0/10 pts Powers Co. purchased equipment for $200,000 on January 1, 2018. The equipment has an estimated service life of 8 years and an estimated residual value of $20,000. Compute the depreciation expense for 2018 (year 1) using the Double-Declining method. Input your answer without dollar signs $.. for example. If your answer is $10,000, input 10,000 as the solution. This historical cost of an asset less its accumulated deprecation is known as: net book value fair market value acquisition cost capitalized value