A coal burning power plant tests and measures coal each day to monitor the percentage of ash in the coal and to ensure it doesn’t get too high. The population mean for percentage of ash in coal is...

A coal burning power plant tests and measures coal each day to monitor the percentage of ash in the coal and to ensure it doesn’t get too high.  The population mean for percentage of ash in coal is 7.26 and a known standard deviation of .06.  What are the Action Limits that the manager of the casino should look out for?