The following LTCFP summarizes the grades for a sample of students that recently took the Provincial examination: Provincial Exam Grade (Less Than CF) Number of Students (LTCFl \"I .k -- _-__!I -_-_3- _=ill F...-- _-__- -- E z 31 70 Grade ['A} a. How many classes are shown on the graph? (3) The number of classes shown is |:| b. How many students were studied to generate this graph? {3} The number of students studied is |:| c. What is the class interval? (3) The class interval is |:| % d. How many students got a grade between 80% to 90%? (5) The number of students is |:| e. What is the median grade? (5) The median grade is |:| 96