I can't solve the ones in red

In recnt years, Whispering Winds Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant was in charge of selecting the depreciation method for each bus, and various methods have been used. Information concerning the buses is summarized in the table below. For Bus \#3, calculate depreciation expense per mile under units-of-activity method. (Round answer to 2 decimal places, eg 0.50.) Depreciation expense permile eTextbook and Media Attempts: 1 of 5 used (a2) Your answer is partially correct. Compute the amount of accumulated depreciation on each bus at December 31. 2022. If Bus 2 was purchased on April 1 instead of January 1, what is the depreciation expense for this bus in (1) 2020 and (2) 2021? (Round answers to 0 decimal places, e.g. 5,275.)