For 101 consecutive days, a process engineer has measured the temperature of champagne bottles as they are made ready for serving. Each day, she took a sample of 9 bottles. The average across all 909 bottles (101 days, 9 bottles per day) was 58 degrees Fahrenheit. The standard deviation across all bottles was 8 degrees Fahrenheit. When constructing an X-bar chart, what would be the upper control limit? Note: Round your intermediate calculations and final answer to 4 decimal places