,---------------------+--------+--------+----------.
| Task                | Start  | End    | Duration |
+---------------------+--------+--------+----------+
| Test prototype      | Day 1  | Day 7  | 7 days   |
+---------------------+--------+--------+----------+
| Prototype completed | Day 7  | Day 7  | 1 day    |
+---------------------+--------+--------+----------+
| Setup assembly line | Day 8  | Day 16 | 9 days   |
+---------------------+--------+--------+----------+
| Setup               | Day 17 | Day 21 | 5 days   |
+---------------------+--------+--------+----------+
| T2                  | Day 8  | Day 9  | 2 days   |
+---------------------+--------+--------+----------+
| T3                  | Day 10 | Day 12 | 3 days   |
+---------------------+--------+--------+----------+
| T4                  | Day 13 | Day 14 | 2 days   |
`---------------------+--------+--------+----------'