help pls

9) \begin{tabular}{|r|l|} \hline date placed in service: & 10/1/21 \\ \hline cost: & $30,000 \\ \hline useful life: & 5 yrs \\ \hline sales price & $10,000 \\ \hline date sold: & 12/31/24 \\ \hline \end{tabular} a) What is the depreciation expense for yr 1 using the straight-line method? b) Calculate any gain or loss when the fixed asset is sold on 12/31/2024. c) What is the balance in the accumulated depreciation account on 12/31/2023