Process time at a workstation is monitored using sample mean charts: Six samples with 10 observations each have been obtained and the sample means computed (in minutes) as follows: It is known from previous experience that the standard deviation of the process is 1 Normal standard deviation applies: What are the upper and lower limits for sample means chart? (Round the intermediate calculations to 2 decimal places. Round the final answers to 3 decimal places.) (A) UCL=4.57,LCL=4.39 (B) UCL=4,96,LCL=4.0 (C) UCL=4.30,LCL=4,0 UCL=4.79,LCL=4.16 None of the above