A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour. One employee had the following sales for the last 20 hours 9 5 2 6 5 6 4 4 4 7
4 4 7 8 4 4 5 5 4 8

(i) The median for the distribution of number of sales per hour is 5 sales per hour.
(ii) The first quartile for the distribution of number of sales per hour is 4 sales per hour.
(iii) For the distribution of number of sales per hour, 50% of the observations are between 3 and 7.5.

Which one is the correct statement(s)) ?