Given the following two distributions: Group A 35 90 55 25 59 60 55 48 Group B 40 56 40 65 75 92 28 70 a) For both distributions, calculate the following: mean (4 marks) ii. mode (2 marks) iii. median (4 marks) iv. variance (4 marks) V. standard deviation (2 marks) b) Sketch the empirical relationship graph based on your answer in a). (4 marks) Hence determine the skewness of the distributions