Explanation
Fajr: 2 Rakat Sunnah, then 2 Rakat Fardh.
Dhuhr: 4 Rakat Sunnah, then 4 Rakat Fardh, then 2 Rakat Sunnah, then 2 Rakat Nafl (optional).
Asr: 4 Rakat Sunnah, then 4 Rakat Fardh.
Maghrib: 3 Rakat Fardh, then 2 Rakat Sunnah, then 2 Rakat Nafl
Isha: 4 Rakat Sunnah, then 4 Rakat Fardh, then 2 Rakat Sunnah, then 2 Rakat Nafl (optional), then 3 Rakat Witr Wajib (obligatory, second to Fardh), then 2 Rakat Nafl (optional)
There are the following 17 Farz in Namaz
2 Farz = Fajr
4 Farz = Zuhar
4 Farz = Asar
3 Farz = Magrib
4 Farz = Isha
17 Total Farz
