DISCUSSION QUESTIONS $1.$ Construct x$-$bar and R control charts to monitor the service at the drive$-$through window. Plot the control charts and explain whether the process is in control or not. Did they manage to meet the expected service time goal of $2\mathrm{.}0$ minutes? Show the control limits below with the numbers you obtain as the result of your analysis. UCLx $=$ x $+$ x $($x$)=$ x LCLx $=$ x $+$ x $($x$)=$x UCLR $=$ x $+($x$)=$ x LCLR $=$ x $+($x$)=$ x Failure to do so receives no credit. $2.$ What is the most appropriate TQM tool you recommend for identifying the cause of the problem and improving customer service? Explain why you chose this tool.