please show all work and cash flow diagram if applic.

8. A VLSI testing station was designed and fabricated for $80,000 with the estimate that it would result in an inspection-cost saving of 11,746 per year for 15 years with a zero salvage value at the end of 15 years, what was the expected IRR? Actually, The VLSI station became absolute after 6 years and was sold for $ 20,000. What was the actual IRR