Please assist with formula for Question 5.

USINESS: CASE STUDY The following data give the hourly wage rates (Rands) for a sample of 20 workers selected from s large company. 12.50 9 45 13,85 7.25 8/70 1460 12.75 1460 12.45 7/50 15.90 9,75 11.50 13.30 6.25 19450 1280 585 9,50 (i) Using the raw data, determine the range. (2 Marks) (ii) What percentage of these workers get paid less than R 10.00 per hour? (3 Marks) (iii) 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. Include the cumulative frequencies. (8 Marks (iv) Determine the mean wage rate using the raw data. (3 Mark (v) Draw an OGIVE curve corresponding to the data and use it to estimate the median. (9 Mark (vi) Another worker is included in this sample. What must be his hourly wage to make the mean exactly R 12.00? (5 Mar