Data in the diagram 1 shows the numbers of books read by a group of 30 students 2 2 8 9 10 2 12 12 15 16 18 12 18 20 21 25 25 18 26 26 28 30 30 26 30 33 33 34 35 30 Diagram 1 a) Based on the data in diagram 1, use a class width of 5 starts with (1-5}. Construct a table of frequency, upper boundary and midpoint. b) State the mode class and calculate the estimated mean for number of book read by student. c} For this part of questions, using scale of 2 cm to 5 books on the horizontai axis and 2 cm to 1 student on the vertical axis, draw a histogram and frequency polygon for the data