solve for the chart with these questions

Auto plstons at Werming Chung's plant in Shanghai are produced in a forging process, and the darneter is a critcal factor that must be controliod. From sample sizes of 10 pietons produchd each day, the mean and the range of this diametor have been as follows: a) What is the value of x ? x=mm(roundyourresponsetotwodecimalplaces). b) What is the value of R ? R=mm(roundyourresponsetotwodecimalplaces). c) What are the UCLx and LCLx using 3-sigma? Upper Control Limit (UCLx)= mm (round your response to two decimal places). Lower Control Limit (LCLx)= mm (round your response to two decimal places). d) What are the UCLR and LCLR using 3-sigma? UpperControlLimit(UCLR)=LowerControlLimit(LCLR)=mm(roundyourresponsetotwodecimalplaces).mm(roundyourresponsetotwodecimalplaces). e) If the true diameter mean should be 155mm and you want this as your center (nominal) line, what are the new UCL Upper Control Limit (UCL- U^)=mm (round your response to two decimal places). Lower Control Limit (LCLx^)=mm (round your response to two decimal places)