Help with this problem please.

4. On January 1, 2020 Creative Cupcakes purchased a cooking trailer for $150,000. Creative Cupcakes expects the trailer to remain useful for 4 years and have a residual value of $10,000. Using the Straight Line method, calculate the depreciation expense for the year 2020 and the Accumulated depreciation of the trailer at the end of 2021. (8 points) Depreciation Expense Dec. 31, 2020: Accumulated Depreciation Dec. 31, 2021: Optional - Show calculations if you would like partial credit just in case one of the above answers is incorrect