I also need the LCLx for a 2 sigma x chart

The overall average on a process you are attempting to monitor is 50.0 units. The process population standard deviation is 1.84. Sample size is given to be 16. a) Determine the 3-sigma x-chart control limits. Upper Control Limit (UCL3) = 51.38 units (round your response to two decimal places). Lower Control Limit (LCLZ) = 48.62 units (round your response to two decimal places). b) Now determine the 2-sigma x-chart control limits. Upper Control Limit (UCL3) = units (round your response to two decimal places)