The following data give the hourly wage rates (Rands) for a sample of 20 workers selected from a large company. 12.50 9.45 13.85 7.25 8.70 14.60 11.75 14.50 10.80 12.45 7.50 15.90 9.75 11.50 13.30 6.25 15.50 12.80 5.35 9.50. Group the data into a frequency distribution with a lowest class lower limit of R 5.00 and a class width of R 2.00. Question 5 (3 Marks) Determine the mean wage rate using the raw data. Question 6 (10 Marks) Draw an OGIVE curve corresponding to the data and use it to estimate the median.