Equipment with a cost of $722,100 has an estimated residual value of $83,100, has an estimated usefur life of 30 years, and is depreciated by the straight line method. a. Determine the amount of the annual depredation. b. Determine the book value at the end of the 18 full years of use. C. Assuming that at the start of the year 19 the remaining life is estimated to be 17 years and the residual valiue is astimated fo ber s?o : on. ditarmine the debreciation expense for each of the remaining 17 years