In these Tasks
Task 3: Creating a sub-summary, adding a calculation field, adding a summary field (to total), re-sorting on a summary field.
Task 4: Creating a sub-summary inside a sub-summary (involves sorting on 2 fields at the same time with each sub-summary based on a different sort field, adding a summary field (to count), placing the same summary field in different parts to display different values, re-sorting on a summary field.
Task 5: Creating a new layout, performing a search, creating a script to carry out the previously identified tasks, attaching a script to a button, creating a simple button with no need for a script.