A company monitors its network's data processing efficiency, which varies with the number of concurrent processes x. The efficiency is measured as the ratio of successfully processed data packets to total data packets and is modeled by E(x)=(a(x^(2)-16))/(b(x^(2)-x-12)) Suppose that a = 40 and b = 51. Determine the limit of the efficincy as x approaches 4. Write only a number as your answer. Round your answer to 2 danswer. Round your answer to 2 decimal place