Need steps on this question and understanding the calculations to find each variable

Using the following data points from these 5 sub-groups, calculate X,R,X,R : Round your calculations to three decimal places. Calculate the UCL and LCL for the X-chart: A2=UCLX=LCLX= Calculate the UCL and LCL for the R-chart: D3=D4=UCLR=LCLR= Now assume that we have: based on this information calculate the following: d2=1=Cp=