Please help with this question thank you for helping.

Bonita Towing Company purchased a tow truck for $189000 on January 1, 2017. It was originally depreciated on a straight-line basis over 10 years with an assumed salvage value of $32000. On December 31, 2019, before adjusting entries had been made, the company decided to change the remaining estimated life to 4 years (including 2019) and the salvage value to $5000. What was the depreciation expense for 2019? $16000. $12800. $47250. $38150