The CPP Co. acquired a semi-truck on January 1 , YR1 at a cost of $216,000. The truck had a six-year useful life and an estimated salvage value of $24,000. The straight-line method of depreciation was used. On January 1, YR4, CPP revised its estimate of the trucks useful life and determined that it would be in use for a total of 11 years from the date of acquisition. Furthermore, the estimated salvage value of the truck was lowered to $20,000. The firm's fiscal yearend is December 31. 1. What is the annual depreciation expense until Dec. 31, YR3? Answer: 2. What is the Book Value of the truck on Dec. 31, YR3? Answer: 3. What is CPP' YR4 depreciation expense? Answer: 4. If on May 1, YR4, in addition to revising the estimates of useful life and salvage value, CPP spent $12,000 for routine maintenance on the truck, what would be CPP's YR4 depreciation