Equipment was acquired on January $1,2019,$ at a cost of $$90,000.$ The equipment was originally estimated to have a residual value of $$5,000$ and an estimated life of $10$ years. Depreciation was recorded using the straight$-$line method. On December $31,2021$ the estimated residual value was revised to $$10,000$ and the useful life was revised to a total of $5$ years remaining from this point on$.$What is the depreciation expense in the first year?What is the adjusting entry on December $31$st$,2021?$