2. Use the following data obtained from ages of the last six U. S. Presidents at the time of their inauguration to answer the following questions: at Inauguration I- Statistics 'Written Problem Set a. [2 pts] Find the mean of the data set. [Round to one decimal place.] (Grade breakdown: 1 for set up and work,- .5 for correct answer; .5 for explanation] Replace the italicized words witliyaur image oftlie solution answer and explanation far question 2a and?) h. [4- pts] Find the standard deviation of the data set. [Do not round until the nal answer: Round nal answer to 1 decilnal place.] (Grade breakdown: 4 for set up, explanation of steps and correct answer] Replace the italicized words witliyaur image oftlse solution, answer and explanation ler question Ell ong} c. [1 pts] 1F.I"|.u"hat percentage of presidents' ages fall within one standard deviation of the mean? [Round to 1 decimal place.] [Grade breakdown: .5 for correct answer, .25 for correct work; .25 for correct explanation] Replace the italicized words witliyaur image oftlse solution, answer and explanation 'br question 2c only)