please upload the process too

2. (3 points) Machinery purchased for $210,000 by Tom Brady Co. in 2013 was originally estimated to have a life of 10 years with a salvage value of $20,000 at the end of that time. Depreciation has been recorded for 7 years on this basis. In 2020, it is determined that the total estimated life should be 15 years with a salvage value of $15,000 at the end of that time. Assume straight-line depreciation. Instructions (a) Determine the depreciation expense for 2020