Spreadsheets - Analysis of Completed Tasks for Thursday the 1 July

Yesterday we had a reliever and Ms Corbett gave us tasks on Gmail here is a graph of the tasks completed.

From the graph I can see that there are 27 students altogether by: adding 0 for the students that did 0 tasks and 0 students did 1 tasks (0) and 6 students did 2 tasks (6) and 3 students did 3 tasks (9) and 5 students did 4 tasks (13) and 5 students did 5 tasks (19) and 8 students did 6 tasks (27) so 27 tasks altogether.