A teacher determined that the grades on the Final exam are normally distributed with a mean grade of 72 and a standard deviation of 16 a] If Yanique had a z score of 1.21, what was her grade? b) Students in the top 16 '36 receive an A. what is the lowest grade a student can get and still get an A? c) Students in the bottom 20% will fail the course. What is the cutoff grade a student can get and still pass