Ruling on praying behind someone who smokes cigarettes and the narghile

It is permissible for the imam to call the adhan, say the iqamah and lead the prayer

Ruling on praying behind someone who is praying alone

A woman walked in front of our row when we were praying in jamaa’ah

Ruling on a smoker leading prayers

Does there have to be one imaam and does he have to be the khateeb?

When is one counted as having caught up with the prayer in jamaa’ah?

Saying salaam before the imaam in cases of urgent need

Foot to foot or shoulder to shoulder?

Who has the most right to lead the prayers?