I want the solution and the Cash Flow Digram. Otherwise dont do it. I will downvote thanks

Problem-8 ASM International, an Australian steel company, claims that a savings of 30% of the cost of stainless steel threaded bar can be achieved by replacing machined threads with precision weld depositions. A U.S. manufacturer of rock bolts and grout-in fittings plans to purchase the equipment. A mechanical engineer with the company has prepared the following cash flow estimates. Determine the expected rate of return per quarter and per year (nominal). Quarter Savings. S 0 Cost, s 450,000 -50,000 40,000 -30,000 -20,000 -10,000 10,000 20,000 30,000 40,000 50,000 80,000 6-12 Answer: CFD: Problem-8 ASM International, an Australian steel company, claims that a savings of 30% of the cost of stainless steel threaded bar can be achieved by replacing machined threads with precision weld depositions. A U.S. manufacturer of rock bolts and grout-in fittings plans to purchase the equipment. A mechanical engineer with the company has prepared the following cash flow estimates. Determine the expected rate of return per quarter and per year (nominal). Quarter Savings. S 0 Cost, s 450,000 -50,000 40,000 -30,000 -20,000 -10,000 10,000 20,000 30,000 40,000 50,000 80,000 6-12 Answer: CFD