what are the formulas for the blank yellow cells?

Arpiccatuen wxpense sor Years 1-4 in the Depreciation Expense column. Enter formulas or absolute cell references for the remaining cells. Prepare the following Straight Line depreciation schedule by using the excel SLN FUNCTION (fx) to calculate the I 2 Depreciation Expense for Years 1-4 in the Depreciation Expense column. Enter formulas or absolute cell references for the remaining cells. Prepare the following Units-of-Production depreciation schedule by entering formulas. Use absolute cell references when appropriate. Prepare the following Double-Declining-Balance depreciation schedule by using the Excel DDB FUNCTION (fx) to calculate Depreciation Expense for Years 1-4 in the Depreciation Expense column. Enter formulas or absolute cell references for the remaining cells