2. Presented below are the components related to an office building that Lockard Company purchased for 10,000,000 in January of 2015. Useful Life 30-year life Component Value Building external works 900,000 Building engineering 2,400,000 Building structure 5,400,000 30-year life 60-year life Instructions (a) Compute depreciation expense for 2015, assuming that Lockard uses component depreciation and uses the straight-line method of depreciation. (b) Compute depreciation expense for 2015, assuming that Lockard depreciates as a single unit and uses the straight-line method of depreciation