pls help.

\begin{tabular}{|l|l|r|} \hline 2) & depreciation method: & straight line \\ \hline purchase date & 8/1/20 & \\ \hline cost: & 20,000 & \\ \hline estimated life: & 5 & YRS \\ \hline sales price & 1,000 & \\ \hline date sold & 12/31/25 & \\ \hline \end{tabular} a) What is the depreciation expense for yr 3 using the straight-line method? b) What is the net book value of the equipment at the end of year 2 ? c) Calculate gain/loss on sale of equipment. d) What is the account balance in accumulated depreciation on 12/31/2023