Sever 05 14 pom Skloped Gandolf Construction Co. purchased a CAT 336DL earth mover at a cost of $425,000 in January 2019. The company's estimated useful life of this heavy equipment is 10 years, and the estimated salvage value is $85,000 Required: a. Using straight-line depreciation, calculate the depreciation expense to be recognized for 2019, the first year of the equipment's afe and calculate the equipment's net book value at December 31, 2021, after the third year of the equipment's de Depreciation expeme Net book value 10 10 References b. Using declining-balance depreciation at twice the straight-ane rate, calculate the depreciation expense to be recognized for 2021 the third year of the equipment's life. Double-declining rate Depreciation expense