Your company has purchased a large new truck$-$tractor for over$-$the$-$road use $($asset class $00\mathrm{.}26).$ It has a cost basis of $$180,000.$ With additional options costing $$15,000.$ Its MV at the end of five years is estimated as $$40,000.$ Assume it will be depreciated under the GDS:

a$.$ What is the cumulative depreciation through the end of year three?

b$.$ What is the depreciation in the fourth year?

c$.$ What is the BV at the end of year two?