he rate of depreciation of a building is given by D t 2000 10 t dollars per year 0 t 10 see the following figure D t 20 000k 15 000 10 000 5000 2 4 6 8 10 a Use the graph to find the total depreciation of the building over the first 5 years t 0 to t 5 b Use the definite integral to find the total depreciation over the first 5 years