Making the intention of Zuhr salaah when performing Asr salaah
Q:
1. I was praying behind the imaam. The imaam was praying asar salaah and I made intention of zohar salaah and I know that it was asar after the prayer. Is my prayer valid or do I have to redo my asar salah?
2. If I am praying alone or with the imam and it is asar time and I make intention of zohar forgetfully and after one rakaah I realize that it is asar, do I have to redo my prayer?
3. What if it was just at the begninng i.e I am doing recitation before fatiha and I realize that it is asar, do I have to redo my niyyah and start over?