On January $1,2024,$ Advanced Airlines purchased a used airplane for $$48,500,000.$ Advanced Airlines expects the plane to remain useful for four years $(4,000,000$ miles$)$ and to have a residual value of $$4,500,000.$ The company expects the plane to be flown $1,600,000$ miles during the first year.

Requirement $1$a$.$ Compute Advanced Airlines's first$-$year depreciation expense on the plane using the straight$-$line method.

Begin by selecting the formula to calculate the company's first$-$year depreciation expense on the plane using the straight$-$line method. Then enter the amounts and calculate the depreciation for the first year.

Requirement $1$b$.$ Compute Advanced Airlines's first$-$year depreciation expense on the plane using the units$-$of$-$production method.

Before calculating the first$-$year depreciation expense on the plane using the units$-$of$-$production method, calculate the depreciation expense per unit. Select the formula, then enter the amounts and calculate the depreciation per unit.

$\backslash$table$[[-,),=,$Depreciation per unit$],[-,),=,]]$