You can view, edit or delete a task on the weekly agenda calendar by expanding the Planning menu and then click on Roster.
View Tasks
Clicking on the task that is being displayed on the Roster page will allow you to view this task.
Edit Tasks
Clicking on the menu icon on the right side of the selected task will allow you to edit this task.
You can now edit the following:
Delete Tasks
Clicking on the Delete button will open a popup that will allow you to confirm or to cancel deleting this task.