1. You surveyed workers to see how much income they are making daily in Dhaka city. Your survey is summarized in the following table: Daily income Number of (in BDT) workers 150-200 900 200-250 10XX 250-300 60X0 300-350 750 350-450 700 Based on this information answer questions a & b: a) Hand-draw a less than type ogive based on the data presented in the table. (10) b) Hand-draw a histogram based on the data presented in the table. (10) 2. Suppose 13 students are enrolled in a geology course and the following are the marks they obtained: 83, 63, 62, 62, 92, 91, 90, 82, 82, 80, 71, 74, 77. a) Construct a steam and leaf diagram to present the data. (12) b) Calculate the median marks obtained by the students. (8)