How I do this

If the lathe is to be depreciated over the early portion of its life by the DDB method and then by a switch to the SL method for the remainder of its life, when should the switch occur? Lathe DDB Lathe SL Depreciation Depreciation n Dn BV n Dn 43000 O 1 7167 35833 1 3583 2 5972 29861 2 3258 3 4977 24884 3 2986 4 4147 20737 4 2765 5 3456 5 6 14401 6 2469 7 2400 12001 7 8 2000 10000 8 2400 1667 8334 9 2500 10 1389 6945 10 2778 11 1157 5787 11 3472 12 965 4823 12 5787In what year should we switch to Straight Line Depreciation in problem #8? O On year 4 we should switch to Straight Line Depreciation. O On year 7 we should switch to Straight Line Depreciation. O On year 10 we should switch to Straight Line Depreciation. O On year 5 we should switch to Straight Line Depreciation