Depreciabion by Three Methods; Partial Years value of 51,920, The equipment was used for 1,200 hours during Year 1, 2,400 hours in rear 2, 2,100 hours in hear 3 , anst 1, 200 houre in Yest 4. Required: Determine the amount ef depreciabion expense for the years ended December 31, Year 1, Year 2, Year 3, and Yeanr activiby method, and (c) the double-declining-balance method. Note: Round all finaf values for each depreci dollar. a. Straight-line method b. Units-of-activity method b. Units-of-nctivity mothod c. Double-decining-talance methad