Refer to the table Factors for Computing Control Chart Limits $(3$ sigma$)$ for this problem.

The overall average of a process you are attempting to monitor at Feryal Erhun Enterprises is $50$ units. The average range is $4$ units. The sample size you are using is $n=5.$

a$)$ What are the upper and lower control limits of a $3$ sigma mean chart?

Upper Control Limit $(UC{L}_x^{-})=,$ units $($round your response to three decimal places$).$