Sir i am stuck for this question

In an experiment, test tyres are put on a random sample of taxis of City A and their distances travelled before one of the four tyres worn out (in thousand miles) are listed below in ascending order: 17 23 24 25 26 28 28 29 29 29 31 32 32 34 34 36 36 37 37 38 38 38 39 39 39 40 40 41 43 44 44 45 45 48 48 49 51 54 56 61 A grouped frequency distribution with 6 classes will be constructed and the smallest observation is used as the lower class limit of the first class. (i) Find the class width. (1 mark) (ii) Find the class limits, class boundaries and class midpoints of the 3"d and the 6th class of the grouped frequency distribution. (Copy and complete the following table in your answer script) Class limits Class boundaries Class midpoint 3" class 6th class (3 marks) (iii) If the largest observation in the data set is replaced by 61.4 (thousand miles), find the revised class width. (1 mark)