Property, Plant and Equipment (in C$ millions) Cost Dec. 31, 2017 Additions Acquisitions Transfers from exploration and evaluation Oil and Processing. Gas Transportation Properties Retail and and Storage Upgrading Refining Other Total $54,360 $112 $3,379 $11,948 $3,809 $73,608 2,465 12 62 64 744 3 151 3,434 67 79 - 79 Intersegment transfers - (5) 5 Changes in asset retirement obligations 43 2 (2) (5) 7 45 Disposals and derecognition (632) (10) (1) (643) Exchange adjustments 362 1 773 3 1,139 $56,741 $127 $3,439 $13,448 $3,974 $77,729 Dec. 31, 2018 Accumulated depletion, depreciation, amortization, and impairment Dec. 31, 2017 $(26,016) Depletion, depreciation, amortization, and impairment (1,811) $(47) (2) $(1,462) $(3,176) $(1,842) $(32,543) (123) (503) (152) (2,591) Disposals and derecognition 586 10 Exchange adjustments (138) (1) = $(27,379) $(50) 596 (264) (1) (404) $(1,585) $(3,933) $(1,995) $(34,942) Dec. 31, 2018 Net book value Dec. 31, 2017 Dec. 31, 2018 Required $28,344 29,362 $65 77 $1,917 1,854 $8,772 $1,967 $41,065 9,515 1,979 42,787 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). 0 years 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%). 0 % 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 $5 million cash proceeds for the year. Determine the gain or loss on the disposal. Note: Do not use any negative signs with your answers. $ 0