a$)$ What is the value of $\stackrel{}{x}?$

$\frac{?}{\text{b}\text{a}\text{r}}(\stackrel{}{x})=154\mathrm{.}8mm($round your response to two decimal places$).$

b$)$ What is the value of $\frac{?}{\text{b}\text{a}\text{r}}(R)?$

$\frac{?}{\text{b}\text{a}\text{r}}(R),mm($round your response to two decimal places$).$

c$)$ What are the $UC{L}_{\stackrel{}{x}}$ and $LC{L}_{\stackrel{}{x}}$ using $3-$sigma?

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

Lower Control Limit $(LC{L}_{\stackrel{}{x}})=mm($round your response to two decimal places$).$

d$)$ What are the $UC{L}_R$ and $LC{L}_R$ using $3-$sigma?