Purdah

Q: Is a woman's foster children (i.e. the children she breastfed) who are female mahram for her biological brother?

Q: Where should one's gaze be when driving a car, especially when living in a non-Muslim country where women hardly wear burqa or niqaab?

Q: Do you have to wear purdah when doing aalimah course?

Q: I reverted to Islam 5 years ago. I have a doubt regarding the clothing of women. What is the actual clothing of a woman according to Quran and hadith. Some say that niqab is compulsory and some says it is not. I know it's better to wear niqab. But I want to know what actually Allah says. What is compulsory or what is the sunnah.

Q:

1. Can a woman travel in a car with a driver within 3-5 km? If the woman sits in the back seat and and the windows are open so that the people outside can clearly see inside, will that be permissible?

2. Can two women travel in the car with the driver within 3-5 km? If they sit in the back seat and the windows are open?

Q: Are women allowed to wear bikinis to swim?

Q: Is a woman's voice purdah? Meaning, can it be heard by a na-mahram.

Q: I learnt in Islam that it is very bad to reveal one's personal secrets to others, but is there any danger in teaching my Muslim brother something new I learnt about Deen like how to perform ghusl? 

Q: Is it permissible to play soccer or any other sport with others while their satr is exposed?

Q: I would like advice regarding the following matter:

In our family, it is a norm that the women who are in parda don’t make parda from our family men but they make parda from everyone else. I did the same when I first went into parda but Alhumdulilah with the encouragement from my apas, Allah granted me the taufeeq to wear parda correctly (i.e for all ghair mahram men). 

My family is not in favor of this decision.

1. An elder has reprimanded me for making parda for my mothers sisters husbands due to the fact that I cannot marry them. What should my reply be to such statements since it is an elder? They adamantly tell me to take it out and sit on the eating table.

2. If my uncles (non mahram) enter the kitchen or the area where the females are and they greet me I reply. I avoid any type of conversation with them. But someone had brought it to my attention that this is hurting their feelings as I use to treat them as if they were my fathers from a young age. Am I correct in what I am doing?

3. Some people say that it is sufficient to just avoid talking to all of these non mahram family men and not wear parda in front of them if ones family is like how my family is. Is this correct?