Z51 Corporation reports the following information in their annual report: 2022 50,000 50,000 Equipment 130,000 110,000 Total Assets 180,000 160,000 Land The company recorded depreciation expense of $20,000 and $17,000 for the years ended December 31, 2022 and 2021, respectively. What is the average useful life for their assets? O 6 years O 8.5 years O 10 years 2021 O 6.5 years