10) A separate class had a course average test grade of an 80, with a standard deviation of 6. a) Using Chebyshev Theorem, what range would include 75% of all grades? b) Using Chebyshev Theorem, what range would include ~90% of all grades? c) If instead we knew the distribution of grades was normally distributed, what range would have ~2/3rds of the grades in it? d) If instead we knew the distribution of grades was normally distributed, what range would have 95% of the grades in it? e) What would be the z score of a student with a 100? f) What would be the z score of a student with a 70? g) What would be the z score of a student with a 0