,------------------+--------+--------+----------.
| Task             | Start  | End    | Duration |
+------------------+--------+--------+----------+
| Prototype design | Day 1  | Day 13 | 13 days  |
+------------------+--------+--------+----------+
| Test prototype   | Day 27 | Day 30 | 4 days   |
`------------------+--------+--------+----------'