4. The following data shows the number of rejects from the assembly line of a local manufacturer recorded for a period of 80 days: Number of rejects Number of days 0 - 4 5-9 14 10- 14 23 15 - 19 20 20 - 24 16 25 - 29 (a) Draw a histogram for the data. (b) Construct a "less than" cumulative frequency distribution and plot a "less than" cumulative frequency polygon. Use the graph to estimate (i) the number of days that produce at most 12 rejects; (ii) the number of rejects exceeded by 10 % of the days