Al Nur Company purchased equipment for AED450,000 which was estimated to have a useful life of 8 years with a residual value of AED50,000 at the end of that time. Depreciation has been recorded for 4 years on a straight-line basis. In 2020 (year 5), it is determined that the total estimated life should be 9 years with a zero (0) residual value at the end of that time. What is the yearly depreciation for the first 4 years? OA. 50,000 per year OB. 200,000 per year OC. 100,000 per year OD. 56,000 per year