8. The following are the number of students in different sections of Math 1 course at AlUB: Section A Section B Section C Total No. of students 30 40 30 100 Draw a pie chart to display the distribution of students in different sections. 9. The following data represent the distribution of time (in minutes) needed to develop computer programs for solving some mathematical problems: Class 10 - 15 15 - 20 20 - 25 25 - 30 30 -35 Total Frequency 15 25 4 3 3 50 Find arithmetic mean of the data. 10. The following data represent the distribution of time (in minutes) needed to develop computer programs for solving some mathematical problems: Class 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 Total Frequency 15 25 4 3 3 50 Find median of the data. 12. The following data represent the distribution of time (in minutes) needed to develop computer programs for solving some mathematical problems: Class 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 Total Frequency 15 25 4 3 3 50 Find mode of the data. 15. The following is the distribution of electricity production (in 000 MW) in different days: Class 2.0-2.4 2.4-2.8 2.8-3.2 3.2-3.6 3.6-4.0 Total Frequency 5 18 28 42 7 1000 Find mean deviation and variance of the distribution