According to the preferred ordering stated here, when are the 4 missed pre-Zuhr Sunnah rak'ahs performed?

Fajr Sunnah, Joining the Congregation, and Catching a Rak'ah

• After the Fard and before the regular 2 post-Zuhr Sunnah rak'ahs.
• After Isha.
• Before the Zuhr Fard congregation even if it has begun.
• Only the next day.