On June 10, 20XX, Wavepoint Systems installed a computerized machine in its factory at a cost of 169,200. The machine's useful life was estimated at four years with a $24,000 sale value. Wavepoint's year-end is December 31. Calculate depreciation for each year of the machine's estimated useful life (applying the partial ownership concept) under each of the following methods: a) b) Straight-line (2 marks) Double-declining-balance