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The River Rock Company sells $400-$pound bags of decorative rocks for landscaping use. The current bagging process yields samples with $\frac{?}{\text{b}\text{a}\text{r}}(\stackrel{}{x})$ and $\frac{?}{\text{b}\text{a}\text{r}}(R)$ values of $400$ pounds and $20$ pounds, respectively. Each sample consists of $12$ observations. Develop the appropriate control charts.

Click the icon to view the values of the $A_2,D_3,$ and $D_4$ constants.

Upper Control Limit $(UC{L}_{\stackrel{}{x}})=-.($Enter your response rounded to two decimal places.$)$

Lower Control Limit $(LC{L}_{\frac{?}{\text{b}\text{a}\text{r}}()})=,.($Enter your response rounded to two decimal places.$)$

Upper Control Limit $(UC{L}_R)=.($Enter your response rounded to two decimal places.$)$

Lower Enter your response rounded to two decimal