The following data set represents the number of reference books bought by 8 students at the book fair. 3 2 4 2 1 2 3 Calculate: (Show your working solution on paper and upload it after complete answer all question) a. The range. (1 mark). b. The median. (2 marks) c. The mode. (1 mark) d. The mean. (3 marks) e. The variance. (Round to 4 decimal places) (3 marks) f. The Standard deviation. (Round to 4 decimal places) (2 marks)