Saved Final Exam The grades on a statistics exam for a sample of students are as follows: 3 Stem Leaf 68 1278 4 J O U - W 156789 points 122457888 8 02:07:23 1156799 1246 60 00 14 If A + = 90%-100% A = 80%-89% B+ = 75%-79% B =70%-74% C+ = 65%-69% C = 60%-64% D+ = 55%-59% D = 50%-54% F = 0-49% What is the most common letter grade earned