solve it using textbook formula

A credit score measures a person's creditworthiness. Assume the average credit score for Americans is 702. Assume the scores are normally distributed with a standard deviation of 5/. a) Determine the interval of credit scores that are one standard deviation around the mean. b) Determine the interval of credit scores that are two standard deviations around the mean. c) Determine the interval of credit scores that are three standard deviations around the mean. a) The interval of credit scores that are one standard deviation around the mean ranges from [| to [ |. (Type integers or decimals. Use ascending order.)