Estimating Useful Life and Percent Used Up The property and equipment footnote from the Deere & Company Equipment and Operations segment follows Property and Depreciation A summary of property and equipment at October 31 follows. Property and Equipment (millions) Useful Lives (Years) 2015 2014 Land $114 120 Buildings and building equipmen 23 2.794 3057 Machinery and equipment " 4833 5009 Dies, patterns, tools, etc 1.347 1352 All other 5 Construction in progress T 875 345 330 1050 11,217 Less accumulated depreciation Total 5846 5894 34025523 Matte Bater Total property and equipment additions in 2015. 2014 and 2013 were $666 million, $1,016 million and $1.158 million, and depreciation was 1692 million, 1696 million and $637 million respectively a. Compute the average uneful life of Deeres depreciable assets at year-end 2015 Round answer to one decimal place 146 x years b. Estimate the percent used up of Deenes depreciable assets at year-end 2015 Round answer to one decimal place (ex: 0.2345-235) 58