on july $1,2023,$ x purchased a new delivery truck for $$90,000.$ x estimates that the delivery truck will have $5$ year useful life, or $115714$ km$,$ and a residual value of $$9,000.$ x has a December $31$ year end. x drove the truck $13,000$ km in $2023$ and $31,000$ km in $2024.$ a$)$Calculate depreciation expense using straight line method for $2023$ and $2024.$ b$)$ Calculate depreciation expense using the double diminishing$-$balance method for $2023$ and $2024.$ c$)$Calculate depreciation expense using the units$-$of$-$production method for $2023$ and $2024.$