7. 8.40 Ned Thompson Labs performs tests on superalloys, titanium, aluminum, and most metals. Tests on metal composites that rely upon scanning electron microscope results can be subcontracted or the labs can purchase new equipment. Evaluate the sensitivity of the economic decision to purchase the equipment over a range of ±20% (in 10% increments) of the estimates for P, AOC, R, n, and MARR (range on MARR is 12% to 18% in 1.5% increments). Use the AW method and plot the results on a sensitivity graph. For which parameter(s) is the AW most sensitive? Least sensitive?Page 269 First cost, P = $−180,000 Salvage, S = $20,000 Life, n = 10 year Annual operating cost, AOC = $−30,000 per year Annual revenue, R = $70,000 per year MARR = 15% per year