A- Presented below are the components related to an office block that Naeem Company is considering purchasing for 10,000,000. Component Useful Life Value Land Indefinite life 3,000,000 Building structure 60-year life 4,200,000 Building engineering 30-year life 2,100,000 Building external works 30-year life 700,000 Required: (a) Compute depreciation expense for 2015, assuming that Naeem uses component depreciation (b) Assume that the building engineering was replaced in 20 years at a cost of 2,300,000. Prepare the entry to record the replacement of the old component with the new component