How long should the Imam continue the post-prayer supplication (Du'a) during a solar eclipse?

The Eclipse Prayers (صلاة الكسوف والخسوف)

• For exactly ten minutes.
• Until the eclipse completely clears and the sun returns to normal.
• Until the time of the next obligatory prayer enters.
• Only for the duration of reciting Surah al-Fatihah once.