,--------------------+-------+--------+----------.
| Task               | Start | End    | Duration |
+--------------------+-------+--------+----------+
| Prototype design   | Day 1 | Day 7  | 7 days   |
+--------------------+-------+--------+----------+
| Test prototype 0   | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 10  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 20  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 30  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 40  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 50  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 60  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 70  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 80  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 90  | Day 8 | Day 11 | 4 days   |
+--------------------+-------+--------+----------+
| Test prototype 100 | Day 8 | Day 11 | 4 days   |
`--------------------+-------+--------+----------'