16. The Chief Officer at manufacturing plant of '789 Dreamliner' aircraft observed that workers performing manufacturing operations at the plant showed signs of a definite learning pattern. He noted that most aircraft manufacturing tasks experienced what he called an 80 percent learning rate, meaning that workers need 20 percent fewer hours to make a part each time their cumulative experience making that part doubled. Thus, if the first part took 100 minutes, the second would require 80 minutes; the fourth would require 64, minutes, and so on. Accordingly he requires calculating the time required for parts 41 to 60