process design, optimization and economics question. please help me solve with full handwritten solution. thank you

b) A chemical industry has purchased an equipment whose first cost is $ 100 000 with an estimated life of eight years. The estimated salvage value of the equipment at the end of its lifetime is $ 20 000. Determine the depreciation and the book value using sinking fund method of depreciation with an interest rate of 1%, compounded annually. (13 marks) Given Financial Data: (A/F, 12%, 8) = 0.0813