7. A survey made on 45 students for number of hours spent on watching T.V in a week is recorded : 8, 4, 7, 10, 12, 15, 10, 9, 8,
7, 12, 14, 16, 5, 6, 13, 8, 7, 9, 14, 10, 15, 12, 6, 15, 12, 7, 6, 9, 10, 6, 15, 14, 10, 4, 9, 8, 10, 7, 4, 8, 7, 13, 6, 18. Arrange the above data in ascending order : (i) How many students watch T.V for more than 15 hours a week? (ii) How many of them spend less than 6 hours a week on T. V.
