Estimating Useful Life, Percent Used Up, and Gain or Loss on Disposal Husky Energy is one of Canada's largest integrated energy companies. Based in Calgary, Alberta, Husky is publicly traded on the Toronto Stock Exchange. The Company operates in Western and Atlantic Canada, the United States and the Asia Pacific Region with upstream and downstream business segments. The company uses IFRS to prepare its financial statements. During 2018, the company reported depreciation expense of $2,591 million. The property and equipment footnote follows. Oil and Gas Processing, Transportation Retail and Property, Plant and Equipment (in C$ millions) Properties Cost and Storage Upgrading Refining Other Total Dec. 31, 2017 $41,815 $86 $2,599 $9,191 $2,930 $56,621 Additions 2,465 12 62 744 151 3,434 Acquisitions Transfers from exploration and evaluation Intersegment transfers 64 - 3 - 67 79 - - 79 - Changes in asset retirement obligations 43 2 Disposals and derecognition (632) - Exchange adjustments 362 = (5) 5 (2) (5) 7 45 (10) (1) (643) 773 3 1,139 Dec. 31, 2018 $44,196 $101 $2,659 $10,691 $3,095 $60,742 Accumulated depletion, depreciation, amortization, and impairment Dec. 31, 2017 $(26,016) $(47) $(1,462) $(3,176) $(1,842) $(32,543) Depletion, depreciation, amortization, and impairment (1,811) (2) Disposals and derecognition Exchange adjustments Dec. 31, 2018 586 (138) $(27,379) - (1) $(50) 10 (264) (123) (503) (152) (2,591) 596 = (1) (404) $(1,585) $(3,933) $(1,995) $(34,942) Net book value Dec. 31, 2017 Dec. 31, 2018 $15,799 $39 $1,137 $6,015 $1,088 $24,078 16,817 51 1,074 6,758 1,100 25,800 Required a. Compute the average useful life of Husky Energy's depreciable assets in 2018. Assume that land is 10% of "Refining." Note: Round your answer to one decimal place (for example, enter 6.8 for 6.77555). b. Estimate the percent used up of Husky Energy's depreciable assets in 2018. Note: Round percentage to one decimal place (for example, enter 6.7% for 6.6555%). c. Consider the disposals and derecognition during the year. This refers to assets that were sold and removed from the balance sheet during 2018. Calculate the net book value of the total PPE disposed during the year. Assume that Husky Energy received $4 million cash proceeds for the year. Determine the gain or loss on the disposal. Note: Do not use any negative signs with your answers.