A town's department of public works is concerned about adverse public reaction to a sewer project that is currently in progress. Because of this, the Commissioner of Public Works has authorized a weekly survey to be conducted of town residents. Each week, a sample of 100 residents is questioned on their feelings towards thé project. The results to date are shown below. To design an appropriate control chart with z=1.96 (z=1.96 correspond to type I error of 5%), what are the UCL and LCL on the control chart?
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