Is it permissible to make up for missed Sunnah prayers, and if permissible, how are the Sunan (Sunnah prayers) performed before and after the Fard (obligatory) prayers made up for?

Some scholars, including Ata, Tawus, Ash-Shafi'i, and Ahmad, held the view that it is permissible to make up missed supererogatory regular (ratibah) prayers. The Malikis permitted this only for the supererogatory prayer of Fajr, citing the action of the Prophet, peace and blessings be upon him, who made up the two rak'ahs of Dhuhr after Asr. The manner of making up the prayer should be as it was originally, whether recited aloud or silently.