Movelt Corporation is the world's leading express$-$distribution company. In addition to its $643$ aircraft, the company has more than $57,000$ ground vehicles that pick up and deliver packages. Assume that Movelt sold a delivery truck for $$27,000.$ Movelt had originally purchased the vehicle and recorded it in the Truck account for $$45,000$ and had recorded depreciation for three years.

$4.$ Prepare the journal entry to record the disposal of the truck, assuming Accumulated Depreciation$-$Truck was $($a$)$ $$18,000,($b$)$ $$12,000,$ and $($c$)$ $$21,000.($If no entry is required for a transaction$/$event$,$ select $"$No Journal Entry Required" in the first account field.$)$