Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Stellar mass ( M☉ ) | Planetary mass ( M⊕ ) | Lum. (L 0 ) | Type | RHAB ( AU ) | RV (cm/s) | Period (days) |
| --- | --- | --- | --- | --- | --- | --- |
| 0.1 | 1.0 | 8 × 10− | M8 | 0.028 | 168.0 | 6.0 |
| 0.21 | 1.0 | 7.9 × 10− | M5 | 0.089 | 65.0 | 21.0 |
| 0.47 | 1.0 | 6.3 × 10− | M0 | 0.25 | 26.0 | 67.0 |
| 0.65 | 1.0 | 1.6 × 10− | K5 | 0.4 | 18.0 | 115.0 |
| 0.78 | 2.0 | 4.0 × 10− | K0 | 0.63 | 25.0 | 209.0 |
Question:
What is the smallest period (days) to have a planetary mass of 1, a stellar mass greater than 0.21 and of the type M0?
Answer:
67.0