127.A manufacturer of personal computers sets tests competing brands and finds that the amounts of energy they require are normally distributed With a mean of 285 kWh and a standard deViation of 9.1 kWh. If the lowest 25% and the highest 30% are not included in a second round of tests, What are the upper and lower limits for the energy amounts of the remaining sets? A. [269.76 300.24] B. [269.76 289.78] C. [280.22 289.78] D. [280.22 300.24]