1. The 2018 financial statements of TESLA include the following footnote: Land and improvements Buildings Machinery, equipment and internal use software Leasehold improvements Construction in progress Total property, plant and equipment - gross (AT COST) Less: accumulated depreciation TOTAL PROPERTY, PLANT and EQUIPMENT - net 5/31/2019 329,000,000 2,445,000,000 4,335,000,000 1,563,000,000 797.000.000 9,469,000,000 (4.725.000.000) 4.744,000,000 5/31/2018 331,000,000 2,195,000,000 4,230,000,000 1,494,000,000 41.000.000 8,891,000,000 (4.437.000.000) 4,454,000,000 $39,117,000,000 $36,397,000,000 Depreciation expense $ 705,000,000 $ 747,000,000 a. Calculate the property, plant and equipment turnover for 5/31/2019 b. Estimate the useful life on average for TESLA's depreciable assets at the end of fiscal year 5/31/2019 C. Estimate the property and equipment's percent-used-up at the end of fiscal year 5/31/2019