Please provide calculator keystokes

According to Beautiful Bride magazine, the average age of a groom is now 26.2 years. A sample of 16 prospective grooms in Chicago revealed that their average age was 28.8 years with a standard deviation of 4.3 years. Test the Beautiful Bride magazine's claim that the average age of a groom is 26.2 years, using a significance level of a = 0.05. Please document work, especially calculator keystrokes. The short essay work may be typed into the computer -or- handwritten and submitted via digital attachment. (+1/10 for correct answer; +10/10 for documentation, e.g. all steps, calculator keystrokes.)