$($solved on excel$)$ The overall average on a process you are attempting to monitor is $60\mathrm{.}0$ units. The process population standard deviation is $1\mathrm{.}84.$ Sample size is given to be $4.$

Part $2$

$$a$)$ Determine the $3-$sigma x overbar$-$chart control limits$.$

Upper Control Limit $($UCL Subscript x overbar$)$equals

$$

$62\mathrm{.}76$ units $($round your response to two decimal$$ places$).$

Part $3$

Lower Control Limit $($LCL Subscript x overbar$)$equals

$$

$57\mathrm{.}24$ units $($round your response to two decimal$$ places$).$

Part $4$

$$b$)$ Now determine the $2-$sigma x overbar$-$chart control limits$.$

Upper Control Limit $($UCL Subscript x overbar$)$equals

$$

enter your response here units $($round your response to two decimal$$ places$).$