Q7. The following series is 20 students' final scores in a public administration analytical technique course: 80, 86, 89, 94, 93, 100, 82, 81, 91, 69, 75, 60, 57, 70, 83, 53, 76, 79, 87, 80.

Q8. In Q7, if the scores are reported on a 100-point scale with "0 to 79" as the C grade, "80 to 89" as the B grade, and "90 or above" as the A grade, use Excel Histogram Procedure to calculate frequencies, percentages, and cumulative percentages of the grade categories. What is the percentage of students who get a C grade in the course? What is the cumulative percentage of the students who get either a B or a C grade? Must show the work and provide excel sheet