When creating an Xbar Chart using Excel, the BEST way to create the control limits in the chart is to:

Group of answer choices

Draw the control limits in by hand.

Only the specification limits are needed.

Select the "Insert" toolbar. Then select "Shapes". Insert a straight line for each of the control limits.

Create a column for LCL and a column for UCL, the value should be the same for each sample. Graph along with the CL and the Xbar for each sample.