How do I set this up in excel for part a?

16. Suppose that private school yearly tuitions in one region of the country have a bell-shaped distribution with a mean of $25,400 and a standard deviation of $1,300. a. Using Excel and showing work at the right, what are the upper and lower limits of the interval that contains 95% of the yearly tuition costs? b. Does a yearly tution cost of $22,300 fall within the interval which contains 95% of all yearly tution costs? Why or why not