82. At a large toy store, scooters arrive unassembled in boxes. To assemble a scooter, the following tasks must be performed:
| Task 1. | Remove parts from the box. |
| Task 2. | Attach wheels to the footboard. |
| Task 3. | Attach vertical housing. |
| Task 4. | Attach handlebars to vertical housing. |
| Task 5. | Put on reflector tape. |
| Task 6. | Attach bell to handlebars. |
| Task 7. | Attach decals. |
| Task 8. | Attach kickstand. |
| Task 9. | Attach safety instructions to handlebars. |
Give reasonable time estimates for these tasks and construct a reasonable order-requirement digraph. What is the earliest time by which these tasks can be completed?