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Grading using "The Curve" When grading using "the curve", the percentages are as follows: A: Top 10% of scores B: Scores between P70 and Pgo C: Middle 40% (scores between P30 and P70) D: Scores between P 10 and P30 F: Bottom 10% of scores 20% 40% 20% 10% 10% P10 P30 P70 P90 CLASS #1: Suppose that the exam grades for Class #1 are as follows: 35 44 46 47 48 51 54 55 55 57 57 58 59 60 60 60 60 61 62 64 68 69 70 72 73 75 75 77 82 85 M = 61.3 o = 11.5 a) Using the mean and standard deviation above and your calculator, determine "the curve" cutoffs. Round these test grade cutoffs to one decimal. Write down what you typed into the calculator. Label them underneath the curve. Test Grades &gt