For the car wash process . {} Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart . The...

Can someone teach me how to solve this, i don't understand

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For the car wash process ."{} Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart .The UCLR equals\\ seconds and the LCLR equals\\ seconds . ( Enter your responses rounded to two decimal places . )