The cost (in Rands) of 30 grocery items is given below. 34.85 29.60 46.20 82.99 78.30 44.10 35.20 42.50 58.40 53.00 45.50 53.20 19.35 33.20 57.30 55.40 43.99 31.60 16.75 58.25 59.60 18.00 45.10 47.45 31.99 15.10 42.40 44.70 36.80 18.20 1.1. Using 5 classes of equal width, construct a grouped frequency distribution of the above data. Let R 10.00 be the lower limit of the smallest class. (7 marks) 1.2. Draw an OGIVE curve depicting the grouped data in 1.1. (5 marks) 1.3. Calculate the mid-60% range. (5 marks) 1.4. Calculate the coefficient of variation and interpret the value obtained. (8 marks)