Cheers Delivery Company purchased a new delivery truck for $51,000 on April 1, 2019. The truck is expected to have a service life of 10 years or 120,000 miles and a residual value of $3,000. The truck was driven 8,000 miles in 2019 and 14,000 miles in 2020. Cheers computes depreciation expense to the nearest whole month. Required: 1. Compute depreciation expense for 2019 and 2020 using the following methods: (Round your answers to the nearest dollar.) a. Straight-line method 2019 2020 $ b. Sum-of-the-years'-digits method 2019 69 $ 2020 $ 10 c. Double-declining-balance method 2019 $ 69 2020 $ d. Activity method 2019 $ 2020 $ 2. For each method, what is the book value of the machine at the end of 2019? At the end of 2020? (Round your answers to the nearest dollar.) a. Straight-line method 2019 2020 $ $ b. Sum-of-the-years'-digits method 2019 $ 69 2020 $ 69 c. Double-declining-balance method 2019 $ 10 2020 $ d. Activity method 2019 69 $ 2020 $