(a) An asset is being depreciated over a 10-year period. It has no salvage value at the end of the 10 years. If the depreciation charge in the third year is P1000, find the depreciation charge in the ninth year: (1) By sinking fund method, assuming i = 0.05. (2) By the straight line method. (3) By the sum of the years digits method. (b) Find the original value of the asset in each of the above three cases.