1. **Problem 1 (a) and (b):** Given the bar chart with classes and number of students: - Class 1 = 40 - Class 2 = 30 - Class 3 = 20 - Class 4 = 25 - Class 5 = 15 (a) The class with the maximum number of students is Class 1 with 40 students. (b) The class with the minimum number of students is Class 5 with 15 students. 2. **Problem 3 (a) and (b):** Given the bar chart with expenditures: - Food = 4000 - Clothes = 3000 - Education = 2000 - Medicine = 2500 - Others = 1500 (a) To find headings with equal expenditures, we compare the values. None of the expenditures are equal. (b) The expenditure on food is 4000. 3. **Problem 4 (a) and (b):** (a) Data for SEE Examinees: Year: 2056, 2057, 2058, 2059 No. of Students: 23, 26, 28, 31 (b) Data for SEE Examinees: Year: 2053, 2054, 2055, 2056, 2057, 2058, 2059 No. of Students: 21, 22, 34, 42, 68, 87, 128 These data sets can be represented as simple bar diagrams with years on the X-axis and number of students on the Y-axis. 4. **Problem 5 (a):** Monthly expenditure of a family: - Education = 800 - House rent = 1200 - Fooding = 1000 - Clothing = 400 - Others = 600 This data can be represented as a simple bar diagram with categories on the X-axis and expenditure amounts on the Y-axis. Final answers: - Max students class: Class 1 - Min students class: Class 5 - Equal expenditures: None - Expenditure on food: 4000 All data for bar diagrams are ready for plotting.