An IT call center is interested in estimating the Capability of their agent response times and efficiency. A total of 29,000 calls came in during the month but 2,500 were not answered. Data consisting of 25,000 calls were collected and the defects found were 2,786. The DPU and Sigma Z Long term value Long term( LT). Note* (ST) short term -1.5 shift. (refer to Z table) a- 0.11145, 2.75 b- 0.096, 2.83 c- None of the above d- 0.1114, 1.22