,------------------+--------+--------+----------.
| Task             | Start  | End    | Duration |
+------------------+--------+--------+----------+
| P_start          | Jul 3  | Jul 3  | 1 day    |
+------------------+--------+--------+----------+
| P_end            | Jul 12 | Jul 12 | 1 day    |
+------------------+--------+--------+----------+
| Prototype design | Jul 4  | Jul 11 | 8 days   |
`------------------+--------+--------+----------'