The total rakats for all 5 prayers are:

1. 2 rakat Sunnah + 2 rakat obligatory (fard) for Fajr = 4
2. Dhuhr: 4 rakat Sunnah + 4 rakat obligatory + 2 rakat Sunnah + 2 rakat nafl = 12
3. Asr: 4 rakat Sunnah + 4 rakat obligatory = 8
4. 3 rakat obligatory, 2 rakat Sunnah, 2 rakat nafl in Maghrib = 7
5. Isha: 4 rakat Sunnah + 4 rakat obligatory + 2 rakat Sunnah + 2 rakat nafl + 3 rakat witr wajib + 2 rakat nafl = 17

ere