The Kingsdun Company buys a delivery van for £25,000 and a boring machine for £25,000. They decide that the delivery van should be depreciated at 25 per cent per annum on a diminishing balance basis, and that the boring machine should be depreciated at 10 per cent per annum on a straight-line basis. Calculate the depreciation charge for each of the first four years of the assets’

lives, and the net book value of each at the end of year 4.