samples size $7$ each were taken from a fertilizer$-$bag$-$filling machine at Panos Kouvelis Lifelong Lawn Ltd$.$ The results wereOverall mean $=60\mathrm{.}75$ lb Average range overline R $=1\mathrm{.}64$ a$)$ For the given sample size, the control limits for $3-$sigma x chart are Upper Control Limit $($UCLz$)=$ Box$/$b $($round your response to three decimal places$)$