According to the practical Rule of Twelfths (Regla de los doceavos) for semi-diurnal tides with a 6-hour duration, what proportion of the total tidal range rises during the second hour after Low Water?

1. 2/12 of the tidal range (accumulating 3/12 total by the end of the second hour)
2. 1/12 of the tidal range
3. 3/12 of the tidal range
4. 6/12 of the tidal range