Two groups of 60 students each were asked how many movies they have watched in the last month. The results for the first group are shown in the following table. Number of movies watched 3 5 6 7 10 Frequency 7 12 18 10 6 2 The quartiles for these results are 4 and 6. (a) Determine down the value of the median for these results. (b) Draw a box-and-whisker diagram for these results on the following grid. 1 2 3 4 5 6 7 8 9 10 11 12 number of movies watched The results for the second group are shown in the following box-and-whisker diagram. 1 2 3 4 5 6 7 8 9 10 11 12 number of movies watched (c) Estimate the number of students in the second group who have watched at least 7 movies