Using the data provided in problem $7$ of Chapter $9,$ what is the upper control limit and lower control limit for the X$-$bar chart? $($In the textbook problem is is called the average chart.$)$

Select the one best answer.

Group of answer choices

UCL $=3\mathrm{.}9,$ LCL $=2\mathrm{.}60$

UCL $=2\mathrm{.}6,$ LCL $=0\mathrm{.}7$

UCL $=2\mathrm{.}75,$ UCL $=0\mathrm{.}70$

UCL $=4\mathrm{.}15,$ LCL $=2\mathrm{.}65$